The Battle of Nuʻuanu began when Kamehameha’s forces landed on the southeastern portion of Oʻahu near Waiʻalae and Waikiki. After spending several days gathering supplies and scouting Kalanikupule’s positions, Kamehameha’s army advanced westward, encountering Kalanikupule’s first line of defense near the Punchbowl Crater. Splitting his army into two, Kamehameha sent one half in a flanking maneuver around the crater and the other straight at Kalanikupule. Pressed from both sides, the Oʻahu forces retreated to Kalanikupule’s next line of defense near Laʻimi. While Kamehameha pursued, he secretly detached a portion of his army to clear the surrounding heights of the Nuʻuanu Valley of Kalanikupule’s cannons. Kamehameha also brought up his own cannons to shell Laʻimi. During this part of the battle, both Kalanikupule and Kaiana were wounded, Kaiana fatally. With its leadership in chaos, the Oahu army slowly fell back north through the Nuʻuanu Valley to the cliffs at Nuʻuanu Pali. Caught between the Hawaiian Army and a 1000-foot drop, over 400 Oahu warriors either jumped or were pushed over the edge of the Pali.