March 11, 1967: Operation Junction City involved more than 25,000 U.S. troops and 575 aircraft sorties. It was an effort to force North Vietnamese and Viet Cong forces away from populated areas and into the open, where superior American firepower could be used against them. The operation included a massive airmobile assault involving 240 troop-carrying helicopters. The United States claimed to have inflicted more than 2,700 casualties on the enemy by March 17.

Brandus, Paul. This Day in U.S. Military History (p. 72). Bernan Press. Kindle Edition.