Short answers, pulled from the story.
The Aleutian Islands campaign was a military campaign fought between the 3rd of June 1942 and the 15th of August 1943 on and around the Aleutian Islands, part of the U.S. Territory of Alaska. It was the only World War II campaign fought on North American soil. Japanese forces occupied the islands of Attu and Kiska in June 1942 before American and Canadian forces recaptured them in 1943.
The Aleutian Islands campaign is known as the "Forgotten Battle" because it has been overshadowed by other events of World War II. Despite being the only campaign of the war fought on North American soil, it receives far less historical attention than contemporaneous battles in the Pacific Theater.
Over 880 Unangax were forcibly evacuated from their home islands and interned in derelict camps in the Alaska Panhandle with less than 24 hours' notice. Conditions were severe, with overcrowding, contaminated water, inadequate food, and little medical care. Of the 831 Unangax relocated to camps in Southeast Alaska, 85 died. The U.S. government formally compensated survivors through the Aleut Restitution Act of 1988, providing $12,000 per survivor and a $5 million trust fund.
American forces suffered 3,829 total casualties during the Battle of Attu, including 549 killed in action and 1,148 wounded. Another 1,200 suffered severe cold-weather injuries, and 614 died from disease. The battle ended on the 29th of May 1943 after one of the largest banzai charges of the Pacific campaign, with American burial teams counting 2,351 Japanese dead.
Japanese forces had withdrawn from Kiska on the 29th of July 1943, slipping away under fog cover roughly two weeks before the Allied landing on the 15th of August 1943. The 34,426 Canadian and American troops who landed after a three-week bombardment found the island abandoned. Allied casualties still reached 313 from friendly fire, booby traps, vehicle accidents, disease, and frostbite.
The Akutan Zero was an almost-intact Mitsubishi A6M2 Zero fighter recovered by American forces in the summer of 1942 during the Aleutian Islands campaign. Recovering the aircraft allowed U.S. forces to test-fly the Zero and study its capabilities, which contributed to improved American fighter tactics later in the war.