The United Babe Resistance or (UBR) is a guerilla force formed to liberate Earth from the aliens. It appeared in Duke Nukem: Land of the Babes.
In a bad dystopian future animalistic aliens have invaded earth, killed all men and enslaved all women. When some of the women escape, with more joining them, they form the United Babe Resistance. They teach themselves to fight like a military organization, reopening the Earth Defense Forces. They find an old time machine, to contact the only hero to ever successfully defeat an alien invasion - Duke Nukem.