The rivermouth fortress had already fallen, so there was no need for him to move along the Lerma River to support it, risking an encounter with the Mexica naval forces. The area around Cuitzeo Lake was controlled by the enemy's fleet and was no longer safe. The latest envoy brought shocking news: the Mexicans had even captured the Huayamo Fortress, gaining complete control over the north of the Capital City.
Pengguari carefully considered and repeatedly questioned the scout before he found the safest route to march. The army first moved southward to the small river that connected to Chapala Lake, then proceeded eastward along the river, making their way through the heartland of the Kingdom directly towards the west of the Capital City. By moving in this manner, the army effectively abandoned the opportunity to harass the rear of the Mexicans' northern army, but it also avoided worrying about its own logistics.