German Invasion of Poland

Germany invaded Poland on 1 September 1939, combining armoured and air power with attacks across several frontiers. Britain and France declared war on Germany two days later. Soviet forces entered eastern Poland on 17 September under the terms of the Nazi–Soviet arrangements, and organised Polish resistance continued after the final major formations surrendered in early October.

Stories can follow soldiers, civilians, diplomats, refugees and intelligence officers as state institutions collapse and are reconstructed underground.