The internet is full of ridiculous things. Some of them are great, ridiculous things, like this College Football Imperialism Map by Reddit user nbingham196, which is way too much fun to track throughout the weeks.
The gist of it is this; Each FBS team starts out the season with all the counties that are closest to their University. That is their territory. Each week, a team can either gain or lose their territory to their opponent. If you beat a team, you get all the land that team had occupied before the game.
Starting off with six straight wins gave the Washington State Cougars a pretty large territory.