Sukarno was the leader of his country's struggle for independence from the Netherlands and was Indonesia's first President from 1945 to 1967. He was replaced by one of his generals, Suharto (see Transition to the New Order), and remained under house arrest until his death.

Sukarno was first exposed to nationalist ideas while living under Tjokroaminoto. Later, while a student in Bandung, he immersed himself in Western, communist, and Islamic political philosophy, eventually developing his own political ideology of Indonesian-style socialist self-sufficiency. He began styling his ideas as Marhaenism, named after Marhaen, an Indonesian peasant he met in southern Bandung area, who owned his little plot of land and worked on it himself, producing sufficient income to support his family. In university, Sukarno began organising study club for Indonesian students, the Algemeene Studieclub, in opposition to the established student clubs dominated by Dutch students.

On early morning of 17 August 1945, Sukarno returned to his house at Jl Pegangsaan Timur No. 56, where he was joined by Mohammad Hatta. Throughout the morning, impromptu leaflets printed by PETA and youth elements informed the population of the impending proclamation. Finally, on 10 am, Sukarno and Hatta stepped to the front porch, where Sukarno declared the independence of the Republic of Indonesia in front of a crowd of 500 people.