Cityless German Challenge

Step 1. Choose Germany.
Step 2. On turn 1 sell/delete your settler and head out to find ruins/encampments with your warrior.
Step 3. Try to upgrade your warriors and use them to farm more units with Germany's unique abillity.
Step 4. As quickly as possible try to use your newly founded (and maintainance-free) army to capture a city-state or a NPC.
Step 5. Enjoy your already built city with population+buildings.
P.s
For added efficiency use a teammate (AI or Player) to earn some free techs when you´ll eventually get that city