The Agao Ranges consisted of a string of inactive volcanoes located on Bassadro. Obsidian, a result of prior eruptions from the volcanoes that had long been quiet, composed the slopes of the mountains and the adjacent lower hills. Navigating through this terrain was treacherous and perilous due to the slick obsidian, the precipitous inclines, and the acute fragments. Notably, the Battle of Bassadro took place here during the era of the Clone Wars.