Academic tenure was put in place in U.S. school systems in the first half of the 20th century to protect teachers from arbitrary punishment, but in the last several decades it has morphed into something else altogether.
More facts about short wars: 1  The second-shortest war in recorded history occurred during the 20th century. Launched on 5 June 1967, the Six Day War was the result of Egypt calling for Arab nations to take action against Israel after leaders in that nation made threats against the country of Syria.
World War II. The Second World War and WWII redirect here. For other uses, see The Second World War (disambiguation) and WWII (disambiguation). World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier.