Assertion: submachine gun | /r/ObjectUse | used by eastern front
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Source sentences:
text: During World War II, the United States Army Ordnance Board observed the effectiveness of various submachine guns used by the eastern front, such as the Sten and MP 40; after conducting these observations, the Ordnance Board decided that it would conduct a study in an attempt to develop a submachine gun that would be similar to a Sten and submitted requirements to the Ordnance Department for this new weapon.