Perhaps if Europe developed it's own military, The US's expenditure would not be so high.
Sweden's current military capacity in case of a war is approximately 270 000 persons.
25 years ago, during the cold war, the military capacity was 2 million.
The military general conscription in Sweden has been limited since the cold war, and these days the military is mostly targeted on peace-keeping, offensive missions in other countries, such as Kosovo. Always on a UN ticket.
-Hedge