20) Canada

Budget: $15.7 billion
Active frontline personnel: 92,000
Tanks: 181
Total aircraft: 420
Submarines: 4

Canada ended up at the bottom of the list due to the country's small number of active personnel, its lack of aircraft carriers and attack helicopters, and its small number of tanks and submarines. However, Canada has still taken part in US operations in Afghanistan and Iraq and it is a member of the NATO military alliance.

Canada is also a partner in the US F-35 program, although it may decline the purchase of F-35s depending upon the outcome of elections in October.