Machmud Singgirei Rumagesan was a king of Sekar and pro-integration activist from West Papua. He founded the movement Gerakan Tjendrawasih Revolusioner Irian Barat (GTRIB) in 1953, and became the member of Supreme Advisory Council in 1959. On 10 November 2020, Singgirei Rumagesan was posthumously declared a National Hero of Indonesia for his lifelong efforts to unite West Irian with Indonesia.

West Papua, formerly Irian Jaya Barat, is an Indonesian province located in Indonesia Papua. It covers most of the two western peninsulas of the island of New Guinea, the eastern half of the Bird's Head Peninsula and the whole of the Bomberai Peninsula, along with nearby smaller islands. The province is bordered to the north by the Pacific Ocean, to the west by Southwest Papua Province, the Halmahera Sea and the Ceram Sea, to the south by the Banda Sea, and to the east by the province of Central Papua and the Cenderawasih Bay. Manokwari is the province's capital and largest city. With an estimated population of 569,570 in mid-2023, West Papua is the least populous province in Indonesia after South Papua, following the separation off in 2022 of the western half of the Bird's Head Peninsula to create the new province of Southwest Papua, containing 52% of what had been West Papua's population.