Operation Toan Thang I was a US and ARVN operation conducted between 8 April 1968 and 31 May 1968 in the Vietnam war. Toan Thang, or "Complete Victory", was part of a reaction to the Tet offensive by forces allied with the Republic of Vietnam designed to put pressure on PLAF (Vietcong) and PAVN (North Vietnamese Army) forces.
Vietnam Helicopter Pilots Association. Operation Toan Thang I information. 29 September 2009.