Hamengkubuwono I, the 1st sultan of Yogyakarta
Hamengkubuwono I Hamengkubuwono I , born Raden Mas Sujana, was the 1st sultan of Yogyakarta. Sujana, the Crown Prince, was known as Prince Mangkubumi prior to becoming sultan of Yogyakarta Sultanate. As a son of Sultan Sunan Prabu of Mataram Mataram ruler, and brother to Prince Heir Apparent Pakubuwono II of Surakarta a dispute arose concerning Succession to the Mataram throne. Prince Mangkubumi challenged brother Pakubuwono II who was aided by the Dutch East India Company seeking a more pliant VOC puppet as Central Javanese king. The war that eventuated was known as the Third Succession War in Mataram. During the war Prince Mangkubumi was aided by brilliant legendary army commander-in-chief Raden Mas Said who fought in a highly effective strategic manner. Mangkubumi won decisive battles at Grobogan, Demak and Bogowonto River. During the War in 1749, Pakubuwono II died and the Crown Prince Mangkubumi became Sultan. At the Battle of Bogowonto River in 1751, the Dutch Army under De Cl...