diff --git a/scripts/verify-battle-scenario-data.mjs b/scripts/verify-battle-scenario-data.mjs
index 8a1abeb..8368643 100644
--- a/scripts/verify-battle-scenario-data.mjs
+++ b/scripts/verify-battle-scenario-data.mjs
@@ -11,6 +11,7 @@ try {
   const { campaignRecruitUnits } = await server.ssrLoadModule('/src/game/data/scenario.ts');
   const { unitClasses, terrainRules } = await server.ssrLoadModule('/src/game/data/battleRules.ts');
   const { itemCatalog, equipmentSlots } = await server.ssrLoadModule('/src/game/data/battleItems.ts');
+  const { sortieFormationRoles } = await server.ssrLoadModule('/src/game/data/sortieDeployment.ts');
 
   const scenarioEntries = Object.entries(battleScenarios);
   const scenarioIds = new Set(scenarioEntries.map(([id]) => id));
@@ -18,6 +19,7 @@ try {
   const terrainKeys = new Set(Object.keys(terrainRules));
   const itemKeys = new Set(Object.keys(itemCatalog));
   const itemNames = new Set(Object.values(itemCatalog).map((item) => item.name));
+  const formationRoles = new Set(sortieFormationRoles);
   const knownRewardUnitIds = new Set([
     ...scenarioEntries.flatMap(([, scenario]) => scenario.units.map((unit) => unit.id)),
     ...(campaignRecruitUnits ?? []).map((unit) => unit.id)
@@ -36,7 +38,7 @@ try {
     validateMap(errors, scenario, terrainKeys, context);
     validateUnits(errors, scenario, classKeys, itemKeys, equipmentSlots, context);
     validateObjectives(errors, scenario, context);
-    validateSortie(errors, scenario, classKeys, context);
+    validateSortie(errors, scenario, classKeys, formationRoles, context);
     validateRewards(errors, scenario, scenarioIds, itemNames, knownRewardUnitIds, context);
   });
 
@@ -190,7 +192,7 @@ function validateObjectives(errors, scenario, context) {
   });
 }
 
-function validateSortie(errors, scenario, classKeys, context) {
+function validateSortie(errors, scenario, classKeys, formationRoles, context) {
   const sortie = scenario.sortie;
   if (!sortie) {
     return;
@@ -204,20 +206,55 @@ function validateSortie(errors, scenario, classKeys, context) {
     errors.push(`${context}: requiredUnits count exceeds sortieLimit`);
   }
 
-  [...(sortie.requiredUnits ?? []), ...(sortie.excludedUnits ?? [])].forEach((unitId) => {
+  const requiredUnits = sortie.requiredUnits ?? [];
+  const excludedUnits = sortie.excludedUnits ?? [];
+  const requiredUnitIds = new Set();
+  const excludedUnitIds = new Set();
+
+  requiredUnits.forEach((unitId) => {
+    if (requiredUnitIds.has(unitId)) {
+      errors.push(`${context}: duplicate required unit "${unitId}"`);
+    }
+    requiredUnitIds.add(unitId);
+  });
+  excludedUnits.forEach((unitId) => {
+    if (excludedUnitIds.has(unitId)) {
+      errors.push(`${context}: duplicate excluded unit "${unitId}"`);
+    }
+    excludedUnitIds.add(unitId);
+    if (requiredUnitIds.has(unitId)) {
+      errors.push(`${context}: unit "${unitId}" cannot be both required and excluded`);
+    }
+  });
+
+  [...requiredUnits, ...excludedUnits].forEach((unitId) => {
     if (!unitIds.has(unitId)) {
       errors.push(`${context}: sortie references missing unit "${unitId}"`);
     }
   });
+  const recommendedUnitIds = new Set();
   sortie.recommendedUnits.forEach((recommendation) => {
+    if (recommendedUnitIds.has(recommendation.unitId)) {
+      errors.push(`${context}: duplicate recommended unit "${recommendation.unitId}"`);
+    }
+    recommendedUnitIds.add(recommendation.unitId);
     if (!unitIds.has(recommendation.unitId)) {
       errors.push(`${context}: recommended unit "${recommendation.unitId}" is missing from units`);
     }
+    if (excludedUnitIds.has(recommendation.unitId)) {
+      errors.push(`${context}: excluded unit "${recommendation.unitId}" cannot also be recommended`);
+    }
+    if (recommendation.role && !formationRoles.has(recommendation.role)) {
+      errors.push(`${context}/${recommendation.unitId}: invalid recommendation role "${recommendation.role}"`);
+    }
     assertNonEmptyString(errors, recommendation.reason, `${context}/${recommendation.unitId}: recommendation reason`);
   });
   sortie.recommendedClasses.forEach((recommendation) => {
     assertNonEmptyString(errors, recommendation.label, `${context}: recommended class label`);
     assertNonEmptyString(errors, recommendation.reason, `${context}/${recommendation.label}: recommended class reason`);
+    if (!Array.isArray(recommendation.classKeys) || recommendation.classKeys.length === 0) {
+      errors.push(`${context}/${recommendation.label}: recommended class must include at least one classKey`);
+    }
     recommendation.classKeys.forEach((classKey) => {
       if (!classKeys.has(classKey)) {
         errors.push(`${context}: recommended class "${recommendation.label}" references unknown classKey "${classKey}"`);
@@ -229,11 +266,15 @@ function validateSortie(errors, scenario, classKeys, context) {
     errors.push(`${context}: deploymentSlots count is lower than sortieLimit`);
   }
   const deploymentTiles = new Set();
+  const deploymentUnitIds = new Set();
   sortie.deploymentSlots.forEach((slot) => {
     if (!isInBounds(slot, scenario.map)) {
       errors.push(`${context}: deployment slot ${slot.x},${slot.y} is outside map`);
       return;
     }
+    if (slot.role && !formationRoles.has(slot.role)) {
+      errors.push(`${context}: deployment slot ${slot.x},${slot.y} has invalid role "${slot.role}"`);
+    }
     const tileKey = `${slot.x},${slot.y}`;
     if (deploymentTiles.has(tileKey)) {
       errors.push(`${context}: duplicate deployment slot ${tileKey}`);
@@ -242,6 +283,12 @@ function validateSortie(errors, scenario, classKeys, context) {
     if (slot.unitId && !unitIds.has(slot.unitId)) {
       errors.push(`${context}: deployment slot references missing unit "${slot.unitId}"`);
     }
+    if (slot.unitId) {
+      if (deploymentUnitIds.has(slot.unitId)) {
+        errors.push(`${context}: duplicate deployment unit slot "${slot.unitId}"`);
+      }
+      deploymentUnitIds.add(slot.unitId);
+    }
   });
 }