A second Dutch military action, Operation Kraai, aimed at destroying the Republic, was launched on 18 December 1948. Despite recapturing the major cities of Java, including the republican capital of Yogyakarta, and all of Sumatra except Aceh in the far north, it triggered the protest resignation of the cabinets of the State of East Indonesia and Pasundan (West Java) and the Sultan of Yogyakarta from his position as regional head. There was also pressure from the United States and the United Nations, in particular in the form of a Security Council resolution. The Dutch agreed to negotiations with Indonesia to arrange a transfer of sovereignty. The Dutch–Indonesian Round Table Conference took place in The Hague from August to November 1949 and resulted in the Dutch agreeing to hand over sovereignty to the Dutch East Indies, except for Western New Guinea. However, many Indonesian nationalists believed that the Dutch had insisted on a federal state in an attempt to weaken or even break up the new nation, a manifestation of a "divide and conquer" strategy. Nevertheless, on 17 December 1949, sovereignty was transferred to the United States of Indonesia.