Mongol invasion of Java

In 1293, Kublai Khan, the Great Khan of the Mongol Empire and the founder of the Yuan Dynasty, sent a large invasion fleet to Java with 20,000 to 30,000 soldiers. This was a punitive expedition against King Kertanegara of Singhasari, who had refused to pay tribute to the Yuan and maimed one of its ministers.

• http://en.wikipedia.org/wiki/Mongol invasion of Java
• Pages 213-214 - Weatherford, J., 2004, Genghis Khan and the Making of the Modern World: Three Rivers Press, New York, 312p.