Bandung lifted Sukarno's spirit and give him tremendous self- confidence to the extent of arrogance.
He demanded Dutch withdrawal from New Guinea or called "West Irian" in Indonesia. After a failed negotiation, in 1950, Indonesia persuaded the United Nation to compel the Netherlands to resume the stalemated negotiation. Failing and frustrated, Indonesia unilaterally abrogated the Netherlands-Indonesia Union. Sukarno launched a new anti-Dutch campaign.
Eventually, Indonesia decided to use force in March 1962 in West Irian. With the intervention of UN Secretary General U Thant and US diplomat Ellsworth Bunker resulted in an agreement stipulating UN administration of West Irian from October 1962 to May 1963 before ending over control to the Indonesian government.