They endured years of battles started by Malay sultans who wanted to get rid of the Portuguese and reclaim their land.Malay forces and organized several attacks and blockades against the Portuguese's position. Frequent raids on Malacca caused the Portuguese severe hardship. In 1521 the second Demak campaign to assist the Malay Sultan to retake Malacca was launched, however once again failed with the cost of the Demak Sultan's life.