The expansionist policy of Mansur Shah was maintained throughout his reign when he later added Kampar and Siak to his realm.[52] He also turned a number of states in the archipelago into his imperial dependencies. The ruler of such states would come to Malacca after their coronation to obtain the blessing of the Sultan of Malacca. Rulers who had been overthrown also came to Malacca requesting the Sultan's aid in reclaiming their throne. One such examples was Sultan Zainal Abidin of Pasai who was toppled by his relatives. He fled to Malacca and pleaded with Sultan Mansur Shah to reinstall him as a ruler. Malacca armed forces were immediately sent to Pasai and defeated the usurpers. Although Pasai never came under the control of Malacca afterwards, the event greatly demonstrated the importance of Malacca and the mutual support it had established among leaders and states in the region.[46] Sultan Mansur Shah died in 1477 whilst Malacca was at the peak of its splendour.