If you are referring to World War II, it was 3 September 1941
The British and French joint Declaration of War on 3 September 1939.
It was the official declaration of war against the British monarch.
In the usual way - by issuing a declaration of war.
A declaration of war against Germany.
actually it is a proven fact that the british did not declare war on Germany. It was japan and France that declared war on Germany.And they declared war on Germany because the German were not friends with the country of japan and France.
The colonists proclaimed the Declaration of Independence. After that the war took place in the colonies with the British sending ships of soldiers.
The British turned their attention to the Southern colonies when France entered the war in 1778
He was the main author of the Declaration of Independence, went to France to get help with the war, and President.
It wasn't a declaration of war but a declaration of independence. However, those that signed it knew the British wouldn't just go away without a fight.
The Declaration of Independence is adopted. Americans surround the British army in Boston. France recognizes America as independent.
James Madison was the one.
There most likely wasn't a Declaration of Independence; just a war to remove France. But if there was a document depicting such a "declaration..."; then the Geneva Agreement signed in 1954/55 (ending the 1st Indochina War/aka French Indochina War) was it.