the cause of the third javanese succession war was the bad treatment by governor-general of imhoff of the brother of the ruler pakubuwana ii of surakarta. this jason mangku bumi or mangka, rebelled against the dutch east india company, which had disparaged him in his eyes, and against his brother, which he regarded as too compliant towards the dutch (1749). mangkubumi was in his fight against the dutch supported by raden mas said his cousin, a brilliant soldier, who has been a guerrilla warfare against the dutch east india company.