The Mongol invasion of Java was a military effort made by Kublai Khan, founder of the Yuan dynasty (one of the fragments of the Mongol Empire), to invade Java, an island in modern Indonesia. In 1293, he 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. However, it ended with failure for the Mongols.