Soviet military assistance to the Indonesian military, had convinced the United States government to pressure the Dutch to seek a peaceful solution to the conflict. The New York Agreement was the result of negotiations that were spearheaded by the American diplomat Ellsworth Bunker. As a face-saving measure for the Dutch, Bunker arranged for a Dutch-Indonesian ceasefire which would be followed by the handover of Western New Guinea on 1 October 1962 to a temporary United Nations Temporary Executive Authority (UNTEA). On 1 May 1963, Indonesia formally annexed Western New Guinea. As part of the New York Agreement, it was stipulated that a popular plebiscite, called the Act of Free Choice, would be held in 1969 to determine whether the West Papuans would choose to remain in Indonesia or seek self-determination. However, American efforts to win over Sukarno proved futile and Indonesia turned its attention to the former British colony of Malaysia, resulting in the Indonesian-Malaysian Confrontation. Ultimately, President Sukarno was overthrown during the Indonesian coup d'état in 1965 and was replaced by the pro-Western Suharto. The American mining company Freeport-McMoRan began exploiting Western New Guinea's copper and gold deposits. Following the Act of Free Choice plebiscite in 1969, West Irian was formally integrated into the Republic of Indonesia. While several international observers including journalists and diplomats criticized the referendum as being rigged, the United States and Australia supported Indonesia's efforts to secure acceptance in the United Nations for the pro-integration vote. In all, 84 member states voted in favor for the United Nations to accept the result, with 30 others abstaining. Due to the Netherlands' efforts to promote a West Papuan national identity, a significant number of West Papuans refused to accept the territory's integration into Indonesia. These formed the separatist Organisasi Papua Merdeka (Free Papua Movement) and have waged an insurgency against the Indonesian authorities, which still continues to this day. Legacy Many monuments and places are dedicated to the Trikora command, and subsequently the operation itself. Numerous monuments were built, notably the two monuments in Jakarta (West Irian Liberation Monument in Central Jakarta and Trikora Monument inside TNI headquarters in East Jakarta), Mandala Command for West Irian Liberation Monument in Makassar, South Sulawesi, and Jayawijaya Monument in Banggai Islands Regency, Central Sulawesi, as well as Trikora monuments in Bitung, North Sulawesi, Morotai Regency, North Maluku, and Ambon, Maluku. Paratroopers involved in Operation Trikora also commemorated into monuments, such