sentences:  Battle of FSB Mary Ann
  
  The Battle of FSB Mary Ann occurred when Viet Cong (VC) sappers attacked the U.S. firebase located in Quảng Tín Province, South Vietnam early on the morning of 28 March 1971.Fire support base (FSB) Mary Ann was located to interdict movement of enemy troops and materiel down the K-7 Corridor and Dak Rose Trail (branches of the Ho Chi Minh trail running from Laos to the coast of South Vietnam).