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 longest American war is: the War in Afghanistan from 10/2001 to 12/2014 (13 years, 2 months) The shortest war involving US should be: the Kosovo War from 03/1999 to 06/1999 (118 days) List of the lengths of American participation in major wars.