If retention rates of US military personnel begin to weaken, it could take years to reverse the trend. Washington - When some 4,500 soldiers heard over the weekend that they'd be deploying to Iraq earlier than expected, many saw it as yet another inconvenience that military personnel must endure. But to some in Washington, the announcement is a glaring sign that the Army really is straining and that its well of rested, trained, and equipped soldiers is running dry. http://www.csmonitor.com/2007/0404/p01s01-usmi.html
Probably not breaking point, but I'm sure they're feeling the pinch same as we are. Spare a thought for the British Army - we're down to about 100,000 now thanks to New Labour and have about 30,000 of those troops in the operational theatre at the moment.