What If the U.S. Could Fight Only One War at a Time?

"Over the past 18 months, the Pentagon has been pursuing a radical change in U.S. defense strategy. The Department of Defense has been working to overhaul the “two-war” defense strategy of the past quarter-century, in favor of one that focuses on winning a single high-stakes fight against China or Russia. This one-war strategy is rooted in an entirely correct judgment that defeating a great-power adversary would be far more difficult than anything the U.S. military has done in decades. Yet it also runs the risk that America won’t have enough military power to deal with a world in which it could face two or more major threats at the same time."