Complex sentence: For the infantry the German MP 38/40 sub machine gun took the British by surprise, and the army issued an urgent requirement for its own sub machine gun, the Sten gun was accepted and between 1941 and 1945, some 3,750,000 were produced.
Split into simpler sentences: For the infantry the German MP 38/40 submachine gun took the British by surprise, and the army issued an urgent requirement for its own submachine gun. The Sten gun was accepted and between 1941 and 1945, some 3,750,000 were produced.