[citation needed] Hatingh was the Dutch East India Company's Governor of the Northeast Coast of Java, located in Batavia.
Pakubuwono II, the ruler of Kartasura Palace at that time, evacuated himself to Ponorogo Regency.
RM Said was 19 years old when he joined his brother, Mangkubumi, to defend the people of Mataram which was oppressed by the Dutch Company, and their king, Pakubuwono II.
RM Said built a fortress in Randuwalang, to the north of Surakarta, and merged his army with Sunan Kuning forces to fight against the Dutch Company.
When Prince Mangkubumi declared that he join the army with RM Said, he chose to guerrilla against the Dutch Company in the jungle in Jogjakarta.
Then, at the age of 22, married again for the second time with Raden Ayu Inten (Kangjeng Ratu Bandara), the daughter of Prince Mangkubumi.
When RM Said separated his army from Raden Mas Garendi, and built a headquarters in Panambangan, then declared himself as Price Mangkunegara I.
Even the Dutch governor of East Java, Baron van Hohendorff, admitted RM Said’s brilliance in war.