The He 111 was developed 
              from 1932 under the guise of a commercial civilian apparatus. Germany 
              did not have the right to military aviation. The first military 
              prototype equipped with 600 hp BMW VI 6.0 Z engines, made its first 
              flight November 17, 1934 and was in the form of a device with rather 
              elegant lines. The prototype of the civilian version took off, for 
              the first time, in May 1935 and could carry 10 people.
            The Heinkel 111 appeared 
              officially on the civil transport lines, and the Germans took advantage 
              of this status to make some photographic reconnaissance over France, 
              England or Russia. The Luftwaffe saw the same year, his first Heinkels 
              He111 B-1 motorized this time by DB600a of 1000ch. Previously, a 
              pre-series He111 A-1 had emerged, but these devices considered poor 
              performance, were sold to China ... This version He111 B-1 is followed 
              by the versions C (civil), D, E , or F all powered by the Daimler 
              Benz DB600. These engines being primarily intended for the hunter 
              BF109 E, the He111 P version was the last to receive DB601 of 1100 
              hp each. On this version, one of the main criticisms of the device 
              is corrected: visibility. For this, the nose is fully glazed, giving 
              the characteristic design of He111.
            The next version, He111 H 
              was the main version in service during the Second World War. The 
              Daimler engines are now replaced by JUMO 211F.This version has been 
              used for many missions such as maritime convoy attacks, target marking, 
              transport: Stalingrad refueling in 1942, and of course bombing. 
              The H version is available in multiple sub-versions: H-2, H-3, H-4, 
              H-5, ... until H-23. The modifications concern the improvement of 
              the motorization while preserving the JUMO, and the reinforcement 
              of the defensive armament.
            We can also quote a marginal 
              and interesting version: the He111 Z. This device intended to tow 
              the giant glider ME321, consisted of two fuselages of Heinkel He111 
              motorized by 5 engines ...
            The He 111 was a versatile 
              and robust aircraft, but with insufficient defensive armament. His 
              figure was no less elegant with the absence of cockpit and elliptical 
              wings. Production ceased in 1944 after having manufactured more 
              than 7,300 machines.