Complex sentence: According to the historian Sastri, Rajadhiraja defeated Somesvara I in the battle of Dannada ("Dhanyakataka") on the banks of the Krishna river compelling the Western Chalukya armies to retreat and the fort at Kollipakki (Kukpak) was razed to the ground.
Split into simpler sentences: According to the historian Sastri, Rajadhiraja defeated Somesvara I in the battle of Dannada ("Dhanyakataka") on the banks of the Krishna river compelling the Western Chalukya armies to retreat. The fort at Kollipakki (Kukpak) was razed to the ground.