The College Football Imperialism Map

The CFB Charts Imperialism Map is a fan-created, season-long project that turns the college football season into a map-based "conquest" game. It started on Reddit and Twitter a few years ago and has become a tradition among college football fans.

Here’s how it works (I think):

• Each FBS team begins the season owning the county in which its school is located (and probably all the nearest counties).
• After every week, the results of the games determine which teams expand their "territory" on the map.
• When Team A plays Team B, the winner takes over all of the loser’s territory.
• That means if a team beats another team that has already conquered a lot of counties, they instantly inherit all of their counties.

The College Football Imperialism Map works on the same principle, except instead of counties it uses a voronoi map.

On this map (presumably) at the beginning of the season the USA is divided up into voronoi territories based on the closest college football team. Again after each game the winning team conquers all the losing team's territory. This includes all the land that the losing team might have previously won from other teams, leading to cascading changes. If the losing team had no territory, then no land is transferred.