Britain goes to war. The German invasion of Poland demonstrated that the policy of appeasement had failed. After refusing to meet Britain's ultimatum to withdraw troops, Britain and France declared war on Germany. The Second World War had begun.
Art and science
The Sutton Hoo burial ship is discovered. Apparently following a dream, Mrs Pretty invited the archaeologist Basil Brown to investigate a series of burial mounds on her estate on the banks of the river Deben in Suffolk. The excavation revealed an Anglo-Saxon burial, uncovering the most significant horde of early medieval artefacts found in Britain (now housed at the British Museum).
The Second World War begins. Germany's invasion of Poland prompted Britain and France to declare war forming the core of the Allied powers. As part of the Soviet-Nazi Pact, the Soviet Union joined the war on the German side, helping, with Italy, to form the Axis Powers. Poland was soon overpowered and the Baltic Republics and Finland were invaded by the Soviet Union.