During this time, he organized several offensives against territories held by the LTTE including Vadamarachchi Operation.
He participated in several military operations against the LTTE such as Operation Riviresa and the Vadamarachchi Operation and is the recipient of a number of awards and military decorations including the Desha Putra Sammanaya.
Both Brig. (later Lt. Gen.) Denzil Kobbekaduwa and Col. (later Maj. Gen.) Vijaya Wimalaratne were killed on August 8, 1992, while making preparations for an operation to capture the Jaffna Peninsula.
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On May 28 troops managed to capture Udupiddy and Valvettithurai, and another column (commandos, under the command of Maj. Sarath Handapangoda) captured Nelliady and advanced towards Point Pedro without giving LTTE units time to regroup.
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The difficulty for the troops to break out from the Thondamanaru area was because LTTE forces blew up the Thondamanaru bridge to delay the government forces from reaching Valvettithurai, the native place of LTTE leader V. Prabhakaran.
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The Operation Liberation or Vadamarachchi Operation, the military offensive carried out by the Sri Lankan military during May to June 1987, to regain the territory of Vadamarachchi in Jaffna peninsula from LTTE control.
Operation Overlord | Operation Enduring Freedom | Operation Barbarossa | Organization for Security and Co-operation in Europe | Operation Market Garden | Organisation for Economic Co-operation and Development | Operation Torch | Operation Vistula | operation | Operation Provide Comfort | Operation Anaconda | Police and Judicial Co-operation in Criminal Matters | Operation Weserübung | Operation Shingle | Operation Ivy | Operation Highjump | Operation Blue Star | Operation Anthropoid | Operation Paperclip | Operation Downfall | Operation Deny Flight | Operation Thunderbolt | Operation Southern Watch | Operation Michael | Operation Entebbe | Operation Condor | Operation Yoav | Operation Varsity | Operation United Shield | Operation Pacific |