Add eastern front alarm scenario

data/campaign/campaign.json

@@ -253,6 +253,11 @@
       "id": "050_wei_succession",
       "title": "Wei Succession",
       "path": "res://data/scenarios/050_wei_succession.json"
+    },
+    {
+      "id": "051_eastern_front_alarm",
+      "title": "Eastern Front Alarm",
+      "path": "res://data/scenarios/051_eastern_front_alarm.json"
     }
   ]
 }