The Roman Emperor Caligula once declared war on the sea god Neptune and had his soldiers stab the ocean.
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The Manhattan Project was a secret U.S. program during World War II to develop atomic weapons.
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The Mongol Empire became the largest contiguous land empire in history.
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In 1809, two countries declared war and then forgot to sign a peace treaty for years.
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The Manhattan Project developed the first atomic bombs during World War II.
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In 1942, a mistaken military exercise caused confusion along the U.S. West Coast.
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The Triassic period marked the first appearance of dinosaurs.
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The Treaty of Versailles officially ended World War I.
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Ancient Egyptians built pyramids as monumental tombs for pharaohs.
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