Age of Empires II: Definitive Edition (PC) - Achievement - No Baggage
Defeat the Crimean Tatars without building a Town Center in "Vytautas' Crusade".
This achievement triggers upon defeat of the Crimean Tatars (Orange), provided that you have not yet built a Town Center.
Your initial forces are enough to clear the Ruthenian Villages (Green) of all occupying Tatars, provided you stay clear of Kazikermen (Blue). Clearing each village grants Villagers and resources - You can build reinforcements with the limited Villagers and resources you have - However, this is not necessary to defeat the Tatars.
After clearing all of the villages of Tatars, another secondary objective will become available to construct a Monastery in three of the villages. Upon completion, you will be granted a large army of Obuchs if you want more units to push the Tatar base with. This is not necessary however as the Tatars do not have a Castle or walls.