Great Britain entered World War 2 in 1939 after Germany invaded Poland.
Great britian
Yes, they entered from the start as Great Britain
Britain
yes, Britain entered the war at the beginning, the united Staes entered the war over two years later.
Poland
Nevelle Chamberlain was the prime minister.
1917 smart
President Roosevelt
The US entered the war on April 6,1917
The United States entered the war in April 1917 on the side of France, Great Britain, & Italy to defeat Germany in November 1918.
Throughout its duration, it was typically called the "Great War" or "World War". Sometimes it was nicknamed the "War to End All Wars", because it was so massively destructive.