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<unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> 7,000 Japanese troops landed and occupied the Aleutian Islands of Attu and Kiska; they were driven out entirely a year later between May and August 1943 by U.S. and Canadian forces. A few days later, 6,000<unk>7,000 Japanese troops landed and occupied the Aleutian Islands of Attu and Kiska; they were driven out entirely a year later between May and August 1943 by U.S. and Canadian forces. The Aleutian Islands campaign in early June 1942 was the only foreign invasion of U.S. soil during World War II and the first significant foreign occupation of American soil since the War of 1812. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Six American civilians were killed in such attacks; Japan also launched two manned air attacks on Oregon as well as two incidents of Japanese submarines shelling the U.S. West Coast.<unk> Six American civilians were killed in such attacks; Japan also launched two manned air attacks on Oregon as well as two incidents of Japanese submarines shelling the U.S. West Coast.