World War II: The Kassel Mission results in the largest loss by a USAAF group on any mission during the war.

The Kassel Mission on 27 September 1944 was also known as the air battle over the Seulingswald. The mission aimed to destroy the factories in Kassel of the engineering works of Henschel & Sohn which built tracked armoured vehicles and their associated infrastructure. See bombing of Kassel in World War II.