With lack of supplies and plagued with malaria and cholera that hit the region, the Mataram troops that arrived at Batavia were exhausted. Mataram troops established an encampment located south of Batavia in an area now known as Matraman (derived from "Mataraman"). The Mataram forces besieged Batavia and disrupted Batavia's water supply by polluting the Ciliwung River, causing a cholera plague in Batavia. During this second siege Jan Pieterszoon Coen suddenly died on 21 September 1629, most likely because of this cholera outbreak. With internal problems among their commanders, and plagued with illness and a lack of supply, Mataram forces were finally forced to retreat.
