1609, its northern territories at the edge of Ganges delta and off Chittagong came under threat by the Portuguese mercenaries and the Mughal government in Bengal. In March 1609, 400 Portuguese mercenaries, led by Sebastian Gonzales Tibao, seized the Sandwip island. Meanwhile, the Mughal governor of Bengal tried to take over Noakhali District. Min Yazagyi was forced to enter into an alliance with the Portuguese to drive out the Mughals. After the Mughals were driven out, Gonzales promptly seized the Arakanese navy, and began raiding as far south as Lemro river. Later, the Portuguese viceroy at Goa sanctioned an attack on Mrauk-U itself. In November 1615, a fleet of 14 Portuguese galliots and 50 smaller war boats led by Francis de Meneses sailed up the Lemro. Alas, the fleet was driven back by Arakanese defences, which included broadsides of a few Dutch ships. Two years later, King Min Khamaung finally captured Sandwip, and put most of its inhabitants to death. Raids of Ganges Delta Arakan grew even stronger, raiding the entire Sundarbans delta to Calcutta to the west and Murshidabad in the north. Tripura became a tributary. The Arakanese sacked Dhaka in 1625, after which the Mughal government withdrew to safer ground inland. Until 1666, when the Mughals came back with a vengeance, the Arakanese terrorised the entire delta, rounding up slaves whom they sold to the Europeans for a handsome profit. Decline of Arakan In 1665, the Mughal Emperor Aurangzeb decided to take action on the Arakanese marauders and launched the Mughal conquest of Chittagong. He also wanted to avenge for his brother Shah Shuja who was killed in exile by the Arakanese king. The Mughal viceroy of Bengal first lured the Portuguese mercenaries in the service of King Sanda Thudhamma guarding the Chittagong region to defect by giving them fiefs. Then the Mughal fleet took Sandwip in late 1665. In January 1666, a Mughal force of 6500 men and 288 boats took Chittagong after a 36-hours' siege. They subsequently took as far south as Ramu. Arakan had lost the Chittagong province which it had held since 1459. Arakan would not recover from the loss of Chittagong, and went into rapid decline. Central authority collapsed in the late 17th century. Sanda Wizaya (r. 1710–1731) briefly revived the kingdom. He went to war with Tripura, and raided Sandwip, Prome and Malun. But after his death, Arakan reverted to chaos where