diff --git a/hwe/compare/turn_state_snapshot.php b/hwe/compare/turn_state_snapshot.php
index 5878fb86..1c9eee28 100644
--- a/hwe/compare/turn_state_snapshot.php
+++ b/hwe/compare/turn_state_snapshot.php
@@ -190,6 +190,7 @@ function comparisonTurnStateSnapshot(array $request): array
     $nationIds = comparisonIntegerList($observe['nationIds'] ?? [], 'nationIds');
     $logAfterId = $observe['logAfterId'] ?? 0;
     $messageAfterId = $observe['messageAfterId'] ?? 0;
+    $includeNationHistoryLogs = $observe['includeNationHistoryLogs'] ?? false;
     $generalCooldownSelectors = comparisonGeneralCooldownSelectors(
         $observe['generalCooldowns'] ?? [],
         'generalCooldowns',
@@ -202,9 +203,17 @@ function comparisonTurnStateSnapshot(array $request): array
         $observe['diplomacyPairs'] ?? [],
         'diplomacyPairs',
     );
-    if (!is_int($logAfterId) || $logAfterId < 0 || !is_int($messageAfterId) || $messageAfterId < 0) {
+    if (
+        !is_int($logAfterId)
+        || $logAfterId < 0
+        || !is_int($messageAfterId)
+        || $messageAfterId < 0
+    ) {
         throw new \InvalidArgumentException('logAfterId and messageAfterId must be non-negative integers');
     }
+    if (!is_bool($includeNationHistoryLogs)) {
+        throw new \InvalidArgumentException('includeNationHistoryLogs must be a boolean');
+    }
 
     $db = DB::db();
     $game = KVStorage::getStorage($db, 'game_env');
@@ -486,6 +495,24 @@ function comparisonTurnStateSnapshot(array $request): array
             ]);
         }
     }
+    if ($includeNationHistoryLogs && $nationIds !== []) {
+        foreach ($db->query(
+            'SELECT id, nation_id, year, month, text FROM world_history WHERE nation_id IN %li ORDER BY id',
+            $nationIds,
+        ) as $row) {
+            $logs[] = comparisonPickRow($row, [
+                'id' => 'id',
+                'nationId' => 'nation_id',
+                'year' => 'year',
+                'month' => 'month',
+                'text' => 'text',
+            ]) + [
+                'scope' => 'nation',
+                'category' => 'history',
+                'generalId' => null,
+            ];
+        }
+    }
 
     $messages = array_map(
         static fn(array $row): array => comparisonPickRow(