2019 marked the 80th anniversary of the invasion of Poland by Germany and then a few weeks later, Russia. It was the event that forced Britain and France to finally declare war on Germany.

In a five week campaign the Wehrmacht fought one of the largest armies in Europe to a point where it collapsed. But the Poles were not necessarily the backward force commiting cavalry to attack tanks as often the narrative of the campaign suggests. In 1939 the Polish army could put more tanks in the field than the US military, she was exporting arms, including the Bofors gun favoured by the British.

Joining Angus is Robert Forczyk.

We've talked to Robert before when we looked at Operation Sea Lion in episode 32, and Case Red: The collapse of France in episode 59. Well, he’s back with his new book Case White: The Invasion of Poland 1939, from Osprey.