2017: The government has ripped off millions of American citizens and made them pay 18x more taxes they needed to already, so the civilians rebelled against the government, broke into military bases and stole thousands of guns.
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Mark Smith, a civilian who was guarding the GCB, the Great Civilian Base, fiddled with his HK-MP5 submachine gun. His job was to immediately shoot any government official he saw, even the President. These days you just couldn't show mercy on an official.