In 1968–73, the Soviet Union and the Peoples Republic of China played crucial military and political roles in the Vietnam War, particularly against the background of larger developments in world politics. The Sino-Soviet split, Sino-American rapprochement, and Soviet-American détente all influenced the North Vietnamese conduct of war. The split made coordination of socialist aid in the second half of the 1960s difficult, but also resulted in a Sino-Soviet competition of aid that enabled North Vietnam to launch the Tet Offensive in early 1968 in the first place. Rapprochement convinced the DRV to launch the Easter Offensive – a second Tet Offensive – in the spring of 1972. Détente eventually forced North Vietnam to rethink its strategy of trying to win a victory against the United States on the battlefield in Indochina and humiliate the superpower at the global level in the process. Despite Moscow and Beijing’s sustained loyalty throughout the conflict in the late 1960s and early 1970s, neither supported Hanoi’s overall strategy during the last years of the war. The Soviet Union preferred a negotiated solution to the conflict, while China jettisoned its world revolutionary positions in the 1970–72 period and instead counselled North Vietnam to settle for a negotiated agreement.