The Dutch supremacy in the region was very strong, so the king and the people in the region could not move freely. This condition became worse with the eruption of Mount Tambora on April 5, 1815, which shook the entire region, and the consequences could be felt throughout the Moluccas, Java, Sulawesi, Sumatra, and Kalimantan. Mount Tambora's eruption resulted in the disappearance of the two kingdoms of Tambora and Papekat. More than 10,000 people were killed.