Complex sentence: Later, the Kingdom of Singapura rose in importance during the 14th century under the rule of Sultan Iskandar Shah and Singapore became an important port, until it was invaded by the Majapahit in 1398.
Split into simpler sentences: Later, the Kingdom of Singapura rose in importance during the 14th century under the rule of Sultan Iskandar Shah and Singapore became an important port. Until it was invaded by the Majapahit in 1398.