When did England join the Second World War?

Germany invaded Poland on September 1, 1939. Since Great Britain had pledged military support to Poland if it were attacked by the Germans, it subsequently declared war against Germany on September 3, 1939, hence beginning World War II. read more

Britain's War Machine: Weapons, Resources, and Experts in the Second World War (Oxford University Press; 2011) 445 pages Harrison, Mark Medicine and Victory: British Military Medicine in the Second World War (2004). read more

Over the course of the war over 1.6 million Canadians served in uniform (out of a prewar population of 11 million), in almost every theatre of the war, and by war's end the country had the third-largest navy and fourth-largest air force in the world. read more