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.
The U.S. war in Afghanistan began in October 2001 and it became the longest war in American history several years ago. In at least one way, that conflict ended when President Obama marked the occasion with a statement heralding the war's âresponsible conclusion.. Shortest wars in American history.