Complex sentence: Harihara I was a commander in the Hoysala Kingdom and been appointed by Veera Ballala III with autonomous powers after the fall of the Seuna and Kampili kingdoms, to administer the northern territories.
Split into simpler sentences: Harihara I was a commander in the Hoysala Kingdom. He had been appointed by Veera Ballala III with autonomous powers after the fall of the Seuna and Kampili kingdoms, to administer the northern territories.