Share This Article 1. The U.S. government officially declared this weapon obsolete in 1911. The 10-pounder Parrot Rifle The Whitworth Rifle The Gatling gun The M1857 12-pounder “Napoleon” 2. These islands were the only US territory occupied by the enemy during World War Two. Bikini and Cocos Islands Nihoa and Necker Islands The US Virgin Islands Attu and Kiska Islands 3. Aaron Burr held this office when he killed Alexander Hamilton in a duel. Vice-President Secretary of the Treasury Governor of New York Secretary of State Loading …