May 8, 1945
They declared war on Germany with France. I don't know the date.
England had joined the Great War when they Declared on Germany for attacking both Belgium and France who were Britains allies
1914
August 4 1914, after Germany did not withdraw from Belgium, Great Britain declared war on Germany.
August 15, 1945 is the date the Allies declared victory over the Japanese.
The day after pearl harbor Roosevelt (FDR) asked congress to declare war on japan.FDR called December 7th "a date which will live in infamy [disgrace]." Germany, an ally of Japan, then declared war on the US.
The US declared war on Germany, hour after Germany declared war on the US on December 11, 1941.
Churchill wasn't Prime Minister of England until 1940. Neville Chamberlain declared war on Germany and Italy in 1939 following the German Invasion of Poland in September 1939.
The US declared war on Germany on Dec 11th 1941, (two days after Germany declared war on the US). Everything since that date to the present is after.
December 11, 1941. only hours after Germany declared war on the US
December 12, 1941
It is the date in 1776 that our forefathers declared America's independence from England.