It will be withdrawing because it has seriously lost the trust of many of its NATO allies. Except for the UK, the rest of NATO has been simply appalled by the U.S. management of the entire affair. The end game is being crafted by Germany, Italy, and Russia because the United States simply locked itself into a position from which it could neither retreat nor go forward. It very quickly became apparent that the air war was not going to force a Serbian capitulation. Rather than commence compensating maneuvers, the United States insisted on rigidity and bellicosity, without developing a crushing military strategy.
German policy is particularly likely to shift after Kosovo.
Germany has a fundamental interest in maintaining good relations with the Russians. From a geopolitical and a financial sense, a hostile Russia is the last thing that Germany needs. The near- confrontation between NATO and Russia over Kosovo was a sobering experience for the Germans. For a few days, they looked into the abyss and the abyss stared back at them. Members of the Red- Green coalition in Bonn are inherently suspicious of both the United States and military adventures.