Crippled
Untrained
Military headquarters would describe the city of Washington DC during the US Civil War.
the medic
Yanks, also known as the Yankees, were the US part in World War 1. It was also a term used to describe the northerners in the Civil War.
its massive navy stoped most German attacks on convoys of brtish ships and when
No, it was a European war we chose to become involved in.
if you mean world war 2 the us the UK an ussr would be examples.
There were no slaves at the time of World War 2.
The Japanese attack on Pearl Harbour on December 7th 1941, would be the only motivation that the US would need during World War II.
the Germans
China
The US contributed some 16 million personnel to the Second World War. I'd say that would indicate they did get involved.