Assuming you have found a legitimate (sites like MegaGames, GameCopyWorld, or Cheat Happens are the legacy standards), follow this protocol:
Medieval 2 - Total War ᐅ 40 Mods, Trainers & Cheats - plitch 9 Jan 2019 — medieval 2 total war trainer 1.03
Then the Mongols arrive. Four full-stack armies. Usually a crisis. But they do not attack his fortress at Antioch. They park their armies in a perfect, unbroken circle on the steppe. They do not move. They do not recruit. They wait. Assuming you have found a legitimate (sites like