05 May 45: In the last days of the war in Europe, anti-Nazi German troops join forces with American soldiers to fight off a Waffen-SS Panzer division trying to recapture a castle fortress in the Austrian Alps where 14 VIP French prisoners had been held. It is the only time that American and German troops join forces in combat in WWII and the only time Americans defended a medieval castle from siege.. #WWII #History