"lanong" could sail long distances and attacked ships as far as the straits of malacca and java. they became notorious from the mid-18th century to the early 19th century for the raids and piracy ("magooray") in most of southeast asia. this was spurred by the rising demand for slave labor in the dutch east indies as well as growing enmity between the moro sultanates and the european colonial powers. each year, dutch, spanish, and english colonies in the region were warned of the "pirate wind", from august to september, when the iranun and banguingui ships would traditionally start raiding. from 1774 to 1794, it is estimated that around 100 to 200 ships were launched annually from the sulu sea to raid the surrounding areas. the raids were either mounted independently or under the orders of the sultanate of sulu and the sultanate of maguindanao, whom the iranun and banguingui were subjects of.