By late April, Baldwin had established a base at the port of Malabang, and planned to march north along the Matling River to Lake Lanao.—started their attack of the Moro fort on Lempesses Hill. The siege of Binidayan lasted about an hour, the Americans first tried firing over the parapets to cut down the defenders on the walls, afterwards, they charged the fort, after an hour the Americans captured the fort, with only 1 American killed and a small number of Moros killed. As the Americans discovered, The Sultan of Bayang and the remaining 600 men (including 150 men sent by other Datus) had moved across the valley to the larger Pandapatan cotta, where they prepared for the impending assault. Knowing that the Americans easily captured the higher fort, they prepared for a heavy beating, but with the Moros having the main advantage, they were confident in their defense.
Capture of Pandapatan cotta Proceeding to the second fort, the Americans crossed three trench lines and surrounded the fort by 4 PM. The Moros set up an impressive defense of the cotta, with deep trenches five feet deep surrounding the cotta, and the stone walls surrounded by sharpened bamboo stakes along with concealed pits filled with sharpened bamboo; the defense of Pandapatan was poised to halt the advancing Americans. When the Americans commenced their assault, they managed to take out a number of defenders on the walls of the fort, but lacking scaling ladders and running low on ammunition,
Hugh A. Drum led an attempt to scale the walls. Company F assaulted the main gate of the fortification, and there a fierce counterattack was launched by the Moros. Company F commanding officer 1st Lieutenant Thomas Vicars was suddenly
decapitated by
lantaka fire, halting the American advance. Though the Americans inflicted heavy casualties on the Moros, the close-up hand-to-hand battle outside the walls continued until sunset, when the Americans retreated under the cover of night. On the way back to camp near the ruins of the Binidayan cotta, flashes of lightning, accompanied by heavy fog and a deluge of rain made life miserable for the Americans. As the Americans withdrew to Binidayan, the 25th Field Artillery courageously crawled on to the battlefield and retrieved the dead and wounded, although they were beaten back and suffering from heavy rain and fog, they inflicted massive damage to the fort and to the morale of the Moros defending it. As the fog cleared, the next morning dawned sunny to reveal the red battle flags replaced by four white flags. The Americans occupied the fort by 6 AM and took eighty-three prisoners, but the sultan and his chief lieutenant were killed trying to escape. The fort was later destroyed by American forces. ==Aftermath==