The offer of a military force to help contain Hitler was made by a senior Soviet military delegation at a Kremlin meeting with senior British and French officers, two weeks before war broke out in 1939.
The new documents, copies of which have been seen by The Sunday Telegraph, show the vast numbers of infantry, artillery and airborne forces which Stalin’s generals said could be dispatched, if Polish objections to the Red Army crossing its territory could first be overcome.
But the British and French side - briefed by their governments to talk, but not authorised to commit to binding deals - did not respond to the Soviet offer, made on August 15, 1939. Instead, Stalin turned to Germany, signing the notorious non-aggression treaty with Hitler barely a week later.
Stalin ‘planned to send a million troops to stop Hitler if Britain and France agreed pact’