diff --git a/frontend/src/api/reports.ts b/frontend/src/api/reports.ts
index 13c4aa5..8b15525 100644
--- a/frontend/src/api/reports.ts
+++ b/frontend/src/api/reports.ts
@@ -1,4 +1,5 @@
 import client from "./client";
+import type { AttackSuccessResult } from "../types/models";
 
 // ── Types ───────────────────────────────────────────────────────────
 
@@ -42,7 +43,7 @@ export interface TestResultsReport {
     technique_id: string;
     state: string;
     platform: string | null;
-    attack_success: boolean | null;
+    attack_success: AttackSuccessResult | null;
     detection_result: string | null;
     red_validation_status: string | null;
     blue_validation_status: string | null;
diff --git a/frontend/src/api/tests.ts b/frontend/src/api/tests.ts
index 5f12da4..b1a3f7f 100644
--- a/frontend/src/api/tests.ts
+++ b/frontend/src/api/tests.ts
@@ -3,6 +3,8 @@ import type {
   Test,
   TestResult,
   ContainmentResult,
+  AttackSuccessResult,
+  DataClassification,
   TestState,
   TestTimelineEntry,
 } from "../types/models";
@@ -32,7 +34,7 @@ export interface RedUpdatePayload {
   description?: string;
   procedure_text?: string;
   tool_used?: string;
-  attack_success?: boolean;
+  attack_success?: AttackSuccessResult;
   red_summary?: string;
   execution_start_time?: string;
   execution_end_time?: string;
@@ -137,6 +139,17 @@ export async function updateTest(
   return data;
 }
 
+/** Update the data classification label for a test (admin only). */
+export async function updateTestClassification(
+  testId: string,
+  dataClassification: DataClassification,
+): Promise<Test> {
+  const { data } = await client.patch<Test>(`/tests/${testId}/classification`, {
+    data_classification: dataClassification,
+  });
+  return data;
+}
+
 // ── Red Team ───────────────────────────────────────────────────────
 
 /** Red Team updates their fields (draft, red_executing). */
@@ -365,7 +378,7 @@ export interface RTEvidenceEntry {
 export interface RTTechniqueEntry {
   mitre_id: string;
   result: "detected" | "not_detected" | "partially_detected";
-  attack_success: boolean;
+  attack_success: AttackSuccessResult;
   platform?: string;
   notes?: string;
   evidence: RTEvidenceEntry[];  // required — at least 1 image
@@ -382,7 +395,7 @@ export interface RTImportPayload {
 export interface RTImportResult {
   created: number;
   skipped: number;
-  items: { mitre_id: string; test_name: string; result: string; attack_success: boolean; evidence_attached: number }[];
+  items: { mitre_id: string; test_name: string; result: string; attack_success: AttackSuccessResult; evidence_attached: number }[];
   warnings: { mitre_id: string; reason: string }[];
   engagement: string;
 }
diff --git a/frontend/src/components/test-detail/DataClassificationBadge.tsx b/frontend/src/components/test-detail/DataClassificationBadge.tsx
new file mode 100644
index 0000000..0a6cc54
--- /dev/null
+++ b/frontend/src/components/test-detail/DataClassificationBadge.tsx
@@ -0,0 +1,84 @@
+import { useState } from "react";
+import { ChevronDown, ChevronUp, Loader2, Lock } from "lucide-react";
+import type { DataClassification } from "../../types/models";
+
+// ── Options ────────────────────────────────────────────────────────
+
+const CLASSIFICATION_OPTIONS: { value: DataClassification; label: string; color: string }[] = [
+  { value: "public", label: "Public", color: "border-gray-500/30 bg-gray-800/50 text-gray-400" },
+  { value: "internal", label: "Internal", color: "border-blue-500/30 bg-blue-900/30 text-blue-400" },
+  { value: "sensitive", label: "Sensitive", color: "border-amber-500/30 bg-amber-900/30 text-amber-400" },
+  { value: "restricted", label: "Restricted", color: "border-red-500/30 bg-red-900/30 text-red-400" },
+];
+
+// ── Props ──────────────────────────────────────────────────────────
+
+interface DataClassificationBadgeProps {
+  value: DataClassification;
+  canEdit: boolean;
+  isSaving: boolean;
+  onChange: (value: DataClassification) => void;
+}
+
+// ── Component ──────────────────────────────────────────────────────
+
+export default function DataClassificationBadge({
+  value,
+  canEdit,
+  isSaving,
+  onChange,
+}: DataClassificationBadgeProps) {
+  const [expanded, setExpanded] = useState(false);
+  const current = CLASSIFICATION_OPTIONS.find((o) => o.value === value) ?? CLASSIFICATION_OPTIONS[1];
+
+  if (!canEdit) {
+    return (
+      <span
+        className={`inline-flex items-center gap-1 rounded-full border px-2 py-0.5 text-[10px] font-medium ${current.color}`}
+      >
+        <Lock className="h-2.5 w-2.5" />
+        {current.label}
+      </span>
+    );
+  }
+
+  return (
+    <div className="relative inline-block">
+      <button
+        onClick={() => setExpanded((v) => !v)}
+        className={`inline-flex items-center gap-1 rounded-full border px-2 py-0.5 text-[10px] font-medium transition-colors hover:opacity-80 ${current.color}`}
+      >
+        <Lock className="h-2.5 w-2.5" />
+        {current.label}
+        {expanded ? <ChevronUp className="h-2.5 w-2.5" /> : <ChevronDown className="h-2.5 w-2.5" />}
+      </button>
+
+      {expanded && (
+        <div className="absolute left-0 top-full z-20 mt-1 w-44 rounded-lg border border-gray-700 bg-gray-900 p-1.5 shadow-xl">
+          {isSaving ? (
+            <div className="flex items-center justify-center py-2">
+              <Loader2 className="h-4 w-4 animate-spin text-gray-500" />
+            </div>
+          ) : (
+            CLASSIFICATION_OPTIONS.map((opt) => (
+              <button
+                key={opt.value}
+                onClick={() => {
+                  onChange(opt.value);
+                  setExpanded(false);
+                }}
+                className={`block w-full rounded px-2 py-1.5 text-left text-xs transition-colors ${
+                  opt.value === value
+                    ? "bg-gray-800 text-white"
+                    : "text-gray-400 hover:bg-gray-800 hover:text-white"
+                }`}
+              >
+                {opt.label}
+              </button>
+            ))
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/frontend/src/components/test-detail/TeamTabs.tsx b/frontend/src/components/test-detail/TeamTabs.tsx
index 81596ac..a62d950 100644
--- a/frontend/src/components/test-detail/TeamTabs.tsx
+++ b/frontend/src/components/test-detail/TeamTabs.tsx
@@ -18,6 +18,7 @@ import type {
   Test,
   TestResult,
   ContainmentResult,
+  AttackSuccessResult,
   TeamSide,
   Evidence,
   TestTimelineEntry,
@@ -61,11 +62,29 @@ const DETECTION_RESULTS: { value: TestResult; label: string; color: string }[] =
 ];
 
 // ── Containment result options ─────────────────────────────────────
+// Order matches Detection's full/none/partial pattern for consistency.
 
 const CONTAINMENT_RESULTS: { value: ContainmentResult; label: string; color: string }[] = [
   { value: "contained", label: "Contained", color: "border-green-500 bg-green-500/10 text-green-400" },
-  { value: "partially_contained", label: "Partially Contained", color: "border-yellow-500 bg-yellow-500/10 text-yellow-400" },
   { value: "not_contained", label: "Not Contained", color: "border-red-500 bg-red-500/10 text-red-400" },
+  {
+    value: "partially_contained",
+    label: "Partially Contained",
+    color: "border-yellow-500 bg-yellow-500/10 text-yellow-400",
+  },
+];
+
+// ── Attack success options ──────────────────────────────────────────
+// Order matches Detection's full/none/partial pattern for consistency.
+
+const ATTACK_SUCCESS_RESULTS: { value: AttackSuccessResult; label: string; color: string }[] = [
+  { value: "successful", label: "Yes", color: "border-green-500 bg-green-500/10 text-green-400" },
+  { value: "not_successful", label: "No", color: "border-red-500 bg-red-500/10 text-red-400" },
+  {
+    value: "partially_successful",
+    label: "Partial",
+    color: "border-yellow-500 bg-yellow-500/10 text-yellow-400",
+  },
 ];
 
 // ── Props ──────────────────────────────────────────────────────────
@@ -81,7 +100,7 @@ interface TeamTabsProps {
   redDraft: {
     procedure_text: string;
     tool_used: string;
-    attack_success: boolean;
+    attack_success: AttackSuccessResult | "";
     red_summary: string;
     execution_start_time: string;
     execution_end_time: string;
@@ -233,28 +252,45 @@ export default function TeamTabs({
         )}
       </div>
 
-      {/* Attack Success toggle */}
+      {/* Attack Success */}
       <div>
-        <label className="mb-1.5 block text-sm font-medium text-gray-300">
+        <label className="mb-2 block text-sm font-medium text-gray-300">
           Attack Successful?
         </label>
         {canEditRed ? (
-          <button
-            onClick={() => onRedFieldChange("attack_success", !redDraft.attack_success)}
-            className={`relative inline-flex h-6 w-11 items-center rounded-full transition-colors ${
-              redDraft.attack_success ? "bg-green-600" : "bg-gray-600"
-            }`}
-          >
-            <span
-              className={`inline-block h-4 w-4 transform rounded-full bg-white transition-transform ${
-                redDraft.attack_success ? "translate-x-6" : "translate-x-1"
-              }`}
-            />
-          </button>
+          <div className="flex flex-wrap gap-2">
+            {ATTACK_SUCCESS_RESULTS.map((opt) => (
+              <button
+                key={opt.value}
+                onClick={() => onRedFieldChange("attack_success", opt.value)}
+                className={`rounded-lg border px-3 py-2 text-sm font-medium transition-colors ${
+                  redDraft.attack_success === opt.value
+                    ? opt.color
+                    : "border-gray-700 bg-gray-800 text-gray-400 hover:border-gray-600"
+                }`}
+              >
+                {opt.label}
+              </button>
+            ))}
+          </div>
         ) : (
-          <span className={`text-sm ${test.attack_success ? "text-green-400" : "text-red-400"}`}>
-            {test.attack_success === null ? "Not set" : test.attack_success ? "Yes" : "No"}
-          </span>
+          <p className="text-sm">
+            {test.attack_success ? (
+              <span
+                className={`inline-flex rounded-full border px-2.5 py-0.5 text-xs font-medium ${
+                  test.attack_success === "successful"
+                    ? "border-green-500/30 bg-green-900/50 text-green-400"
+                    : test.attack_success === "not_successful"
+                      ? "border-red-500/30 bg-red-900/50 text-red-400"
+                      : "border-yellow-500/30 bg-yellow-900/50 text-yellow-400"
+                }`}
+              >
+                {ATTACK_SUCCESS_RESULTS.find((o) => o.value === test.attack_success)?.label}
+              </span>
+            ) : (
+              <span className="text-gray-500">Not set</span>
+            )}
+          </p>
         )}
       </div>
 
@@ -660,12 +696,20 @@ export default function TeamTabs({
             <div>
               <dt className="text-xs font-medium uppercase text-gray-500">Attack Success</dt>
               <dd className="mt-0.5 text-sm">
-                {test.attack_success === null ? (
-                  <span className="text-gray-500">Not set</span>
-                ) : test.attack_success ? (
-                  <span className="text-green-400">Yes</span>
+                {test.attack_success ? (
+                  <span
+                    className={
+                      test.attack_success === "successful"
+                        ? "text-green-400"
+                        : test.attack_success === "not_successful"
+                          ? "text-red-400"
+                          : "text-yellow-400"
+                    }
+                  >
+                    {ATTACK_SUCCESS_RESULTS.find((o) => o.value === test.attack_success)?.label}
+                  </span>
                 ) : (
-                  <span className="text-red-400">No</span>
+                  <span className="text-gray-500">Not set</span>
                 )}
               </dd>
             </div>
diff --git a/frontend/src/components/test-detail/TestDetailHeader.tsx b/frontend/src/components/test-detail/TestDetailHeader.tsx
index 81d701f..da2c36f 100644
--- a/frontend/src/components/test-detail/TestDetailHeader.tsx
+++ b/frontend/src/components/test-detail/TestDetailHeader.tsx
@@ -18,8 +18,9 @@ import {
 } from "lucide-react";
 import { useMutation } from "@tanstack/react-query";
 import { requestDiscussion } from "../../api/tests";
-import type { Test, TestState, User } from "../../types/models";
+import type { Test, TestState, User, DataClassification } from "../../types/models";
 import LiveTimer from "./LiveTimer";
+import DataClassificationBadge from "./DataClassificationBadge";
 
 // ── Progress steps ─────────────────────────────────────────────────
 
@@ -87,6 +88,8 @@ interface TestDetailHeaderProps {
   onHold: () => void;
   onResume: () => void;
   isTogglingHold: boolean;
+  onUpdateClassification: (value: DataClassification) => void;
+  isUpdatingClassification: boolean;
 }
 
 // ── Component ──────────────────────────────────────────────────────
@@ -109,6 +112,8 @@ export default function TestDetailHeader({
   onHold,
   onResume,
   isTogglingHold,
+  onUpdateClassification,
+  isUpdatingClassification,
 }: TestDetailHeaderProps) {
   const role = user?.role ?? "";
   const currentIdx = STATE_INDEX[test.state];
@@ -524,6 +529,12 @@ export default function TestDetailHeader({
               >
                 {getStateLabel(test)}
               </span>
+              <DataClassificationBadge
+                value={test.data_classification}
+                canEdit={role === "admin"}
+                isSaving={isUpdatingClassification}
+                onChange={onUpdateClassification}
+              />
             </div>
             <p className="mt-1 text-sm text-gray-400">
               Created {formatDate(test.created_at)}
diff --git a/frontend/src/pages/ImportRTPage.tsx b/frontend/src/pages/ImportRTPage.tsx
index eb10fbc..43799d9 100644
--- a/frontend/src/pages/ImportRTPage.tsx
+++ b/frontend/src/pages/ImportRTPage.tsx
@@ -34,7 +34,7 @@ const TEMPLATE_JSON: RTImportPayload = {
     {
       mitre_id: "T1059.001",
       result: "detected",
-      attack_success: true,
+      attack_success: "successful",
       platform: "windows",
       notes: "PowerShell execution caught by Defender for Endpoint within 2 min",
       evidence: [
@@ -48,7 +48,7 @@ const TEMPLATE_JSON: RTImportPayload = {
     {
       mitre_id: "T1078",
       result: "not_detected",
-      attack_success: true,
+      attack_success: "successful",
       platform: "windows",
       notes: "Credential reuse via stolen credentials — undetected for 48h",
       evidence: [
@@ -67,7 +67,7 @@ const TEMPLATE_JSON: RTImportPayload = {
     {
       mitre_id: "T1486",
       result: "not_detected",
-      attack_success: false,
+      attack_success: "not_successful",
       platform: "windows",
       notes: "Ransomware blocked by AppLocker before execution",
       evidence: [
@@ -81,7 +81,7 @@ const TEMPLATE_JSON: RTImportPayload = {
     {
       mitre_id: "T1190",
       result: "partially_detected",
-      attack_success: true,
+      attack_success: "partially_successful",
       platform: "linux",
       notes: "Exploit worked but only a partial alert fired — no full incident created",
       evidence: [
@@ -231,7 +231,7 @@ export default function ImportRTPage() {
                       ["name", "string", "Engagement name"],
                       ["techniques[].mitre_id", "string", "e.g. T1059.001"],
                       ["techniques[].result", "enum", "detected | not_detected | partially_detected"],
-                      ["techniques[].attack_success", "boolean", "Was the attack successful?"],
+                      ["techniques[].attack_success", "enum", "successful | not_successful | partially_successful"],
                       ["techniques[].evidence", "array", "Min 1 image required per technique"],
                       ["techniques[].evidence[].filename", "string", "e.g. screenshot_edr.png"],
                       ["techniques[].evidence[].data", "string", "Base64-encoded image (PNG/JPG/GIF/WebP/BMP, max 10 MB)"],
@@ -299,7 +299,7 @@ export default function ImportRTPage() {
         <textarea
           value={jsonText}
           onChange={(e) => handleTextChange(e.target.value)}
-          placeholder={`Paste your JSON here or use the template…\n\n{\n  "name": "Red Team Q1 2024",\n  "techniques": [\n    {\n      "mitre_id": "T1059.001",\n      "result": "detected",\n      "attack_success": true\n    }\n  ]\n}`}
+          placeholder={`Paste your JSON here or use the template…\n\n{\n  "name": "Red Team Q1 2024",\n  "techniques": [\n    {\n      "mitre_id": "T1059.001",\n      "result": "detected",\n      "attack_success": "successful"\n    }\n  ]\n}`}
           rows={14}
           className="w-full rounded-lg border border-gray-700 bg-gray-800 px-3 py-2.5 font-mono text-xs text-gray-200 placeholder-gray-600 focus:border-cyan-500 focus:outline-none resize-none"
         />
@@ -361,10 +361,13 @@ export default function ImportRTPage() {
                       </span>
                     </td>
                     <td className="px-4 py-2.5">
-                      {t.attack_success
-                        ? <span className="text-orange-400">Success</span>
-                        : <span className="text-gray-500">Blocked</span>
-                      }
+                      {t.attack_success === "successful" ? (
+                        <span className="text-orange-400">Success</span>
+                      ) : t.attack_success === "partially_successful" ? (
+                        <span className="text-yellow-400">Partial</span>
+                      ) : (
+                        <span className="text-gray-500">Blocked</span>
+                      )}
                     </td>
                     <td className="px-4 py-2.5 text-gray-400 capitalize">{t.platform ?? "—"}</td>
                     <td className="px-4 py-2.5 text-gray-500 max-w-xs truncate">{t.notes ?? "—"}</td>
diff --git a/frontend/src/pages/TestDetailPage.tsx b/frontend/src/pages/TestDetailPage.tsx
index 33f1fa2..c852792 100644
--- a/frontend/src/pages/TestDetailPage.tsx
+++ b/frontend/src/pages/TestDetailPage.tsx
@@ -22,12 +22,13 @@ import {
   resumeTimer,
   holdTest,
   resumeTest,
+  updateTestClassification,
   getTestTimeline,
   getRetestChain,
 } from "../api/tests";
 import { uploadEvidence, getEvidence } from "../api/evidence";
 import { useAuth } from "../context/AuthContext";
-import type { TestResult, ContainmentResult, TeamSide, TestTimelineEntry } from "../types/models";
+import type { TestResult, ContainmentResult, AttackSuccessResult, DataClassification, TeamSide, TestTimelineEntry } from "../types/models";
 
 import TestDetailHeader from "../components/test-detail/TestDetailHeader";
 import TeamTabs from "../components/test-detail/TeamTabs";
@@ -72,10 +73,17 @@ export default function TestDetailPage() {
   const [holdModal, setHoldModal] = useState(false);
   const [holdReason, setHoldReason] = useState("");
 
-  const [redDraft, setRedDraft] = useState({
+  const [redDraft, setRedDraft] = useState<{
+    procedure_text: string;
+    tool_used: string;
+    attack_success: AttackSuccessResult | "";
+    red_summary: string;
+    execution_start_time: string;
+    execution_end_time: string;
+  }>({
     procedure_text: "",
     tool_used: "",
-    attack_success: false,
+    attack_success: "",
     red_summary: "",
     execution_start_time: "",
     execution_end_time: "",
@@ -131,7 +139,7 @@ export default function TestDetailPage() {
       setRedDraft({
         procedure_text: test.procedure_text || "",
         tool_used: test.tool_used || "",
-        attack_success: test.attack_success ?? false,
+        attack_success: test.attack_success ?? "",
         red_summary: test.red_summary || "",
         execution_start_time: isoToDatetimeLocal(test.execution_start_time),
         execution_end_time: isoToDatetimeLocal(test.execution_end_time),
@@ -179,7 +187,7 @@ export default function TestDetailPage() {
       updateTestRed(testId!, {
         procedure_text: redDraft.procedure_text || undefined,
         tool_used: redDraft.tool_used || undefined,
-        attack_success: redDraft.attack_success,
+        attack_success: redDraft.attack_success || undefined,
         red_summary: redDraft.red_summary || undefined,
         execution_start_time: redDraft.execution_start_time || undefined,
         execution_end_time: redDraft.execution_end_time || undefined,
@@ -351,6 +359,15 @@ export default function TestDetailPage() {
     onError: (err: unknown) => showToast(extractError(err), "error"),
   });
 
+  const updateClassificationMutation = useMutation({
+    mutationFn: (value: DataClassification) => updateTestClassification(testId!, value),
+    onSuccess: () => {
+      invalidateAll();
+      showToast("Data classification updated", "success");
+    },
+    onError: (err: unknown) => showToast(extractError(err), "error"),
+  });
+
   // Evidence upload
   const uploadMutation = useMutation({
     mutationFn: ({ file, team }: { file: File; team: TeamSide }) =>
@@ -513,6 +530,8 @@ export default function TestDetailPage() {
         onHold={() => setHoldModal(true)}
         onResume={() => resumeHoldMutation.mutate()}
         isTogglingHold={holdMutation.isPending || resumeHoldMutation.isPending}
+        onUpdateClassification={(value) => updateClassificationMutation.mutate(value)}
+        isUpdatingClassification={updateClassificationMutation.isPending}
       />
 
       {/* Content: Tabs + Sidebar */}
diff --git a/frontend/src/pages/ValidatedTestsPage.tsx b/frontend/src/pages/ValidatedTestsPage.tsx
index dc92d1d..c687ac5 100644
--- a/frontend/src/pages/ValidatedTestsPage.tsx
+++ b/frontend/src/pages/ValidatedTestsPage.tsx
@@ -13,7 +13,7 @@ import {
   Swords,
 } from "lucide-react";
 import { getTests } from "../api/tests";
-import type { Test, TestResult } from "../types/models";
+import type { Test, TestResult, AttackSuccessResult } from "../types/models";
 
 /* ── Result helpers ─────────────────────────────────────────────────── */
 
@@ -41,19 +41,23 @@ function DetectionBadge({ result }: { result: TestResult | null | undefined }) {
   );
 }
 
-function AttackBadge({ success }: { success: boolean | null | undefined }) {
+function AttackBadge({ success }: { success: AttackSuccessResult | null | undefined }) {
   if (success === null || success === undefined)
     return <span className="text-gray-600 text-xs">—</span>;
+  const isSuccess = success === "successful";
+  const isPartial = success === "partially_successful";
   return (
     <span
       className={`inline-flex items-center gap-1 rounded-full border px-2 py-0.5 text-xs font-medium ${
-        success
+        isSuccess
           ? "bg-orange-500/10 text-orange-400 border-orange-500/20"
-          : "bg-gray-500/10 text-gray-400 border-gray-600/20"
+          : isPartial
+            ? "bg-yellow-500/10 text-yellow-400 border-yellow-500/20"
+            : "bg-gray-500/10 text-gray-400 border-gray-600/20"
       }`}
     >
       <Swords className="h-3 w-3" />
-      {success ? "Success" : "Blocked"}
+      {isSuccess ? "Success" : isPartial ? "Partial" : "Blocked"}
     </span>
   );
 }
diff --git a/frontend/src/types/models.ts b/frontend/src/types/models.ts
index 84280b9..01927f8 100644
--- a/frontend/src/types/models.ts
+++ b/frontend/src/types/models.ts
@@ -60,6 +60,10 @@ export type TestResult = "detected" | "not_detected" | "partially_detected";
 
 export type ContainmentResult = "contained" | "partially_contained" | "not_contained";
 
+export type AttackSuccessResult = "successful" | "not_successful" | "partially_successful";
+
+export type DataClassification = "public" | "internal" | "sensitive" | "restricted";
+
 export type ValidationStatus = "pending" | "approved" | "rejected";
 
 export type TeamSide = "red" | "blue";
@@ -87,7 +91,7 @@ export interface Test {
 
   // Red Team fields
   red_summary: string | null;
-  attack_success: boolean | null;
+  attack_success: AttackSuccessResult | null;
   execution_start_time: string | null;
   execution_end_time: string | null;
   red_validated_by: string | null;
@@ -145,6 +149,9 @@ export interface Test {
   retest_of: string | null;
   retest_count: number;
 
+  // Data classification
+  data_classification: DataClassification;
+
   // Technique info (populated in list endpoints)
   technique_mitre_id: string | null;
   technique_name: string | null;