The last major breakthrough was on October 8, 1972. Earlier, North Vietnam had been disappointed by the results of its Nguyen Hue offensive (known in the west as the Easter Offensive), which had led the United States to retaliate with Operation Linebacker, a major campaign of airstrikes that blunted the north`s engine in the south and caused damage to the north. They also feared increasing isolation if Nixon`s efforts to détente significantly improve U.S. relations with the major communist powers, the Soviet Union and the People`s Republic of China, which supported North Vietnamese military efforts. In a meeting with Mr. Kissinger, he significantly changed his negotiating line, allowing the Saigon government to remain in power and find a definitive solution to the negotiations between the two South Vietnamese parties. Within 10 days, the secret discussions prepared a final draft. Kissinger held a press conference in Washington, where he said that “peace is at hand.” However, as American casualties increased throughout the conflict since 1965, American support for the war deteriorated and in the fall of 1972 the Nixon administration came under intense pressure to withdraw from the war. As a result, the United States exerted strong diplomatic pressure on its South Vietnamese ally to sign the peace treaty, even though the concessions Thiu wanted could not be obtained.
Nixon promised to continue to provide substantial assistance to South Vietnam and, given his recent victory in the presidential election, it seemed possible that he could keep that promise. To demonstrate his seriousness towards Thiu, Nixon ordered the bombing of Operation Linebacker II in northern Vietnam in December 1972. Nixon also attempted to strengthen the South Vietnamese armed forces by ordering that large quantities of U.S. military equipment and equipment be returned to South Vietnam from May to December 1972 under Operation Enhance and Enhance Plus.  These operations should also keep North Vietnam at the negotiating table and prevent them from abandoning negotiations and aspiring to total victory. When the North Vietnamese government agreed to resume “technical” talks with the United States, Nixon on December 30 ordered an end to bombing north of the 20th parallel. With the United States pledging to withdraw (and after Nixon`s threats that the South Vietnamist would be abandoned if he did not agree), Ertin had little choice but to join. At the time of the peace agreement, the United States agreed to replace the equipment in succession.