On this day, a major battle begins for control of Tay Ninh City. More than 1,500 North Vietnamese and Viet Cong attacked the provincial capital, capturing part of the city. The next day, 2,000 South Vietnamese reinforcements were sent in to aid the local garrison and after a four-day battle, the North Vietnamese were driven out of the city. Elsewhere, South Vietnamese forces launched Operation Lam Son 261 in Thua Thien and Quang Tri Provinces in I Corps Tactical Zone. The operation lasted until April 24, 1969, resulting in 724 enemy casualties.