Aachen Flugzeugbau was a German aircraft manufacturer of the early 20th century, established around the time of World War I. With the end of the war, and the prohibition on powered flight in Germany, the firm began to specialise in sailplane construction, and in 1921 became known as Aachener Segelflugzeugbau, producing designs by Wolfgang Klemperer. It was purchased by Junkers in 1923. Ypres, 1917, in the vicinity of the Battle of Passchendaele. ... This is a list of aviation-related events from 1921: Events Bessie Coleman attends flying school in France and became the first licensed African-American female pilot. ... For the Prussian/German landowning classes, see junker. The name Junkers is well known in connection with aircraft, which were produced under this name for the Luftwaffe during World War II. They were instrumental in many campaigns such as bombing Guernica and airborne landings on Crete with Ju 52, or... This is a list of aviation-related events from 1923: Events January Air Union is created by the merger of Compagnie des Messageries Aériennes (CMA) with Grands Express Aériens (CGEA). ...