"The Middle Ages" or "The Dark Ages"(DUN DUN DUUUUUN)
The brinkmanship which is one of the strategies of the United States failed to prevent the Vietnam war because when American founded attacks, the Vietnamese fought back along using the guerrilla strategy and these Vietnamese think that all men are created equal.
He served as U.S. minister to St. Petersburg (1831–33) for the Andrew Jackson administration, U.S. senator (1834–45), and secretary of state (1845–49) in the cabinet of Pres. James K. Polk.