WORLD HISTORY

Detailed explanation-1: -1, 1939, the British gave Nazi dictator Adolf Hitler an ultimatum: pull out of Poland, or else. Hitler ignored the demand, and two days later, on Sept. 3, 1939, Britain and France declared war.

Detailed explanation-2: -When Britain declared war on Germany on 3 September 1939 it did so for only one reason-Germany had invaded Poland, and Britain had guaranteed to support her ally, like it had supported Belgium in WW1. The diplomat and writer Sir Nicholas Henderson, himself a former ambassador to Poland, called it “a fatal guarantee".

Detailed explanation-3: -France and Britain responded to the invasion of Poland by declaring war on Germany on September 3, 1939. But they did not engage in a major battle with Germany until spring 1940, when the French, especially, found little success in halting the German advance in western Europe.

Detailed explanation-4: -Russia’s support of Serbia brought France into the conflict. Germany declared war on Russia on 1 August and France on 3 August. Germany’s violation of Belgian neutrality and British fears of German domination in Europe brought Britain and its empire into the war on 4 August.

Detailed explanation-5: -Britain and France declared war on Germany in September 1939 in response to the invasion of Poland. The period between September 1939 and April 1940 is often called the ‘Phoney War’ because, although war raged at sea, very little happened in Western Europe during this time.