"Operation Liberation", also known as the "Vadamarachchi Operation", was launched after months of planning on 26 May 1987. Brigadier Kobbekaduwa commanded the operation on the ground as the Brigade Commander of the 3 brigade group formed comprising two infantry brigades with supporting armored, artillery and air units of the Sri Lanka Air Force numbering 8000 personal. It was the largest formation deployed by the Sri Lankan Army at that point and the first conventional battle to take place in the civil war. The objective was to take the territory of Vadamarachchi in the Jaffna peninsula from LTTE (Tamil Tiger) control. LTTE forces destroyed the bridge at Thondaimanaru to slow army progress towards Valvettithurai, the town of LTTE leader Prabhakaran's birth. On 28 May, army troops captured Udupiddy, Valvettithurai and Nelliady. By the end of the first week of June, the army had gained control over the entire zone and captured a large cache of arms left by the LTTE."Operation Liberation One". The Sunday Times.
