United States. On 15 December 1961, the NLF established its own military called Liberation Army of South Vietnam (LASV) to fight against the American supported Army of the Republic of Vietnam. The LASV was controlled and equipped by the PAVN. General Trần Văn Trà, one-time commander of the B2 Front (Saigon) HQ confirms that even though the PAVN and the LASV were confident in their ability to defeat the regular ARVN forces, U.S. intervention in Vietnam forced them to reconsider their operations. The decision was made to continue to pursue "main force" engagements even though "there were others in the South – they were not military people – who wanted to go back to guerrilla war," but the strategic aims were adjusted to meet the new reality. We had to change our plan and make it different from when we fought the Saigon regime, because we now had to fight two adversaries — the United States and South Vietnam. We understood that the U.S. Army was superior to our own logistically, in weapons and in all things. So strategically we did not hope to defeat the U.S. Army completely. Our intentions were to fight a long time and cause heavy casualties to the United States, so the United States would see that the war was unwinnable and would leave. . During the Vietnamese Lunar New Year Tết holiday starting on 30 January 1968, the PAVN/VC launched a general offensive in more than 60 cities and towns throughout south of Vietnam against the US Army and Army of the Republic of Vietnam (ARVN), beginning with operations in the border region to try and draw US forces and ARVN troops out of the major cities. In coordinated attacks, the U.S Embassy in Saigon, Presidential Palace, Headquarters of the Joint General Staff and Republic of Vietnam Navy, TV and Radio Stations, Tan Son Nhat Air Base in Saigon were attacked by commando forces known as "đặc công". This offensive became known as the "Tet Offensive". The PAVN sustained heavy losses of its main forces in southern military zones. Some of its regular forces and command structure had to escape to Laos and Cambodia to avoid counterattacks from US forces and ARVN, while local guerrillas forces and political organisations in South Vietnam were exposed and had a hard time remaining within the Mekong Delta area due to the extensive use of the Phoenix Program.