Explain why the second world war broke out in 1939

Hitler's invasion of Poland in September 1939 drove Great Britain and France to declare war on Germany, marking the beginning of World War II. Over the next six years, the conflict would take more lives and destroy more land and property around the globe than any previous war.

World War 2 broke out in 1939 because Germany invaded Poland, but there is a long background leading up to the conflict. Since Hitler's rise to power in 1933, the western allies in Europe, primarily Great Britain and France, had followed a policy of appeasement.

a variant spelling of the word dote (british)