Conversation so far:
When did Diponegoro start fighting the Dutch?
he played an important role in the Java War between 1825 and 1830
Was he successful in Diponegoro's fight against the Dutch?
He was defeated and exiled to Makassar  where he died.
Why did Diponegoro fight the Dutch?
Dutch colonial rule was becoming unpopular among local farmers because of tax rises, crop failures and among Javanese nobles because the Dutch colonial authorities deprived them of their right to lease land
Did Diponegoro try anything else before fighting?
Prophesies and stories, ranging from visions from the tomb of Sultan Ageng Tirtayasa to his contact with Nyai Roro Kidul, spread across the populace

Question: How many were in his army?
Self-contained rewrite: How many were in Diponegoro's army?