West Papua issue was a bilateral matter between the Netherlands and Indonesia regarding an incomplete process of decolonization of the Netherlands East Indies. West Papua was neither a separate entity nor a non-self-governing territory detached from the Netherlands East Indies. The problem arose when the Netherlands insisted on maintaining its presence in the western half New Guinea . At the beginning, there was no international dimension to this problem until Indonesia brought the issue to the United Nations in 1954 after all bilateral means had been exhausted. Therefore, West Papua was an unresolved question of decolonization of Indonesian territory of what was once the Netherlands East Indies.
Source : Papua Story