 The turning point of the war was the 1968 Tet Offensive, in which communist forces attacked cities and towns throughout South Vietnam.At the time, Westmoreland was focused on the Battle of Khe Sanh and considered the Tet Offensive to be a diversionary attack.It is not clear if Khe Sanh was meant to be distraction for the Tet Offensive or vice versa; sometimes this is called the Riddle of Khe Sanh.