It was formed in Memot, Cambodia, and directed through COSVN. According to the Pentagon Papers, the Viet Cong "placed heavy emphasis on the withdrawal of American advisors and influence, on land reform and liberalization of the GVN, on coalition government and the neutralization of Vietnam." The identities of the leaders of the organization often were kept secret. Support for the VC was driven by resentment of Diem's reversal of Viet Minh land reforms in the countryside. The Viet Minh had confiscated large private landholdings, reduced rents and debts, and leased communal lands, mostly to poorer peasants. Diem brought the landlords back to the villages. People who had been farming land for years had to return it to landlords and pay years of back rent. Marilyn B. Young wrote that "The divisions within villages reproduced those that had existed against the French: 75 percent support for the NLF, 20 percent trying to remain neutral and 5 percent firmly pro-government". North Vietnamese involvement In March 1956, southern communist leader Lê Duẩn presented a plan to revive the insurgency entitled "The Road to the South" to the other members of the Politburo in Hanoi; however, as both China and the Soviets opposed confrontation at this time, Lê Duẩn's plan was rejected. Despite this, the North Vietnamese leadership approved tentative measures to revive the southern insurgency in December 1956. This decision was made at the 11th Plenary Session of the Lao Dong Central Committee. Communist forces were under a single command structure set up in 1958. In May 1958, North Vietnamese forces seized the transportation hub at Tchepone in Southern Laos near the demilitarized zone between North and South Vietnam. The North Vietnamese Communist Party approved a "people's war" on the South at a session in January 1959, and, in May, Group 559 was established to maintain and upgrade the Ho Chi Minh trail, at this time a six-month mountain trek through Laos. On 28 July, North Vietnamese and Pathet Lao forces invaded Laos, fighting the Royal Lao Army all along the border. Group 559 was headquartered in Na Kai, Houaphan province in northeast Laos close to the border. About 500 of the "regroupees" of 1954 were sent south on the trail during its first year of operation. The first arms delivery via the trail was completed in August 1959. In April 1960, North Vietnam imposed universal military conscription for adult males. About 40,000