After staging Polish attacks on German forces to create the appearance of Polish aggression, Germany invaded Poland, beginning WWII. Britain and France declared war on Germany two days later, and all the members of the Commonwealth of Nations, with the exception of Ireland, rapidly followed suit. The German blitzkrieg crushed the Polish defenses. Within a month all of Poland was occupied by German forces as well as the forces of what state with whom Germany had just signed a non-aggression pact? Discuss