well there are still 50 000 american troops in germany...i guess noone told them that hitler was cought
also - what do you expect - they alone spend more money on military than the next top 15 countries togather (russia+china+uk+..+..+) because if they didnt and called back all of the troops from all over the world they would have HUGE unemployment since they dont make anything and people simply wouldnt have jobs.