When was the submachine gun introduced that was manufactured by Emil Bergmann's father?
MP35:  It was developed in the early 1930s by Emil Bergmann (son of Theodor Bergmann) and manufactured at the Bergmann company in Suhl (that also built one of the first submachine guns, the MP 18). MP 18: The MP 18 manufactured by Theodor Bergmann "Abteilung Waffenbau" was the first submachine gun used in combat. MP 18:  It was introduced into service in 1918 by the German Army during World War I as the primary weapon of the "Sturmtruppen", assault groups specialized in trench combat.
1918