The Me 323 was the result of a 1940 German requirement for a large assault glider in preparation for Operation Sea Lion, the projected invasion of Great Britain. The DFS 230 light glider had already proven its worth in the Battle of Fort Eben-Emael in Belgium (the first ever assault by gliderborne troops), and would later be used successfully in the invasion of Crete in 1941
Proposed 'escort' gunship version, based on the E-1. Classified as a Waffentrager (weapons carrier) by the RLM, which the WT suffix denoted, in a similar role to that of the American YB-40 Flying Fortress "gunship" heavy defensive fighter conversion for the USAAF. Primary mission was to provide normal 323 cargo formations with heavy defensive protection. No cargo carrying ability. "Solid" nose with 20mm cannon turret, two additional wing turrets plus up to ten other machine guns/cannon of varying calibres firing from standard and new waist/beam positions. 1.3 tonnes of armour plating was added across the entire airframe. Crew increased to twenty-one, the extra crew-members operating the plane's guns. Two prototypes built and tested, but series was cancelled after it was judged that normal single-engined fighters were more effective in the transport escort role. One of the prototypes was briefly assigned to KG 200 for operational evaluation, where it flew armed escort for the small number of captured B-17 Flying Fortresses operated by the Geschwader