フレンスブルク政府
In 1945, Grand Admiral Karl Dönitz stayed for a few days in Plön, where he established a temporary command post. Before fleeing to Flensburg, the castle was the administrative headquarters for parts of the Flensburg Government for a single day on 2 May 1945. The castle survived both world wars without suffering any wartime damage. Afterwards British occupation troops entered Schleswig-Holstein and Hamburg as part of VIII Corps under General Evelyn Barker, and established their headquarters in the castle.