See: Commonwealth
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Congress passed the Sabotage Act and the Sedition Act
trade embargo.
The Allies held trials against Japanese citizens who brutally mistreated prisoners at war.
The FBI and Army and Navy counterintelligence agents and OSS agents spied on the spies to prevent them from gathering info
For World War 1: the US, Britain and Commonwealth, France, Russia and Japan. For World War 2: the US, Britain and Commonwealth, France and the Soviet Union.