In 1960, the UN deployed the United Nations Operation in the Congo (UNOC), the largest military force of its early decades, to restore order to the breakaway State of Katanga, restoring it to the control of the Democratic Republic of the Congo by 1964. However, the Security Council found itself bypassed in favour of direct negotiations between the superpowers in some of the decade's larger conflicts, such as the Cuban Missile Crisis or the Vietnam War. Focusing instead on smaller conflicts without an immediate Cold War connection, the Security Council deployed the United Nations Temporary Executive Authority in West New Guinea in 1962 and the United Nations Peacekeeping Force in Cyprus in 1964, the latter of which would become one of the UN's longest-running peacekeeping missions.
On 25 October 1971, over US opposition, but with the support of many Third World nations, along with the Socialist People's Republic of Albania, the mainland, communist People's Republic of China was given the Chinese seat on the Security Council in place of the Republic of China; the vote was widely seen as a sign of waning US influence in the organization. With an increasing Third World presence and the failure of UN mediation in conflicts in the Middle East, Vietnam and Kashmir, the UN increasingly shifted its attention to its ostensibly secondary goals of economic development and cultural exchange. By the 1970s, the UN budget for social and economic development was far greater than its budget for peacekeeping.