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.
Introduction. The Second Battle of Bull Run (Manassas) proved to be the deciding battle in the Civil War campaign waged between Union and Confederate armies in northern Virginia in 1862.nion Major General John Pope lost about 15,000 men in the Second Battle of Bull Run (Manassas), along with his reputation.