Rumsfeld Says Two-War Theory Doesn't Work: WASHINGTON — The military definitely will change in the coming years, Defense Secretary Donald H. Rumsfeld told U.S. senators on Thursday. He just couldn’t exactly tell them how. Rumsfeld adamantly said the two "major-theater war" plan, the idea the military could successfully fight two major wars in two parts of the world at the same time, doesn’t work, he said. And he can’t tell them — yet — what will work.