Although America remained neutral in WW2, it had a massive troop presence
Calm before the storm
The OAS and Anti-Comintern pact engaged in a cold war for the next 15 years. Durig that time, the US military Industrial complex was born, and thus suited the role for each of the OAS members as their militaries were being refitted with state of the art weapons.
World War 3
Today, the US is only number four in the list of world powers, outstripped by the Indian League, the Commonwealth of Oceania, and the Hispanic-American Alliance.