1st Brigade of the Eighth Army Corps under the command of Harrison Gray Otis launched a massed frontal assault on the Filipino redoubts. The 20th Kansas Volunteer Infantry Regiment were ordered to advance along the Manila Bay coastline through a wooded area near Caloocan as the 3rd Field Artillery Regiment and 1st Montana Volunteer Infantry Regiment concurrently executed a flanking maneuver on the settlement's right side. As American troops advanced towards the Filipino positions, they realized that the defenders of Caloocan were firing too high, leading them to only inflict minor casualties upon advancing U.S. forces. Encouraged by this, the Americans abandoned their previous tactic of slowly advancing under the safety of suppressive fire and started rushing towards the Filipino positions, only stopping on occasion to fire off a number of fusillades at the Filipino positions before advancing again. As the 20th Kansas Volunteer Infantry Regiment closed in on Caloocan, the flanking attack neared the settlement as well. Led by Major J. Franklin Bell, a company of the 1st Montana Volunteer Infantry Regiment snuck into Caloocan from the east and attacked Filipino positions in their rear. Thinking they were trapped, Filipino forces in Caloocan panicked and started to retreat. U.S. troops rapidly captured the Filipino trenches and charged into the settlement, which had been set aflame by the American artillery bombardment. A detachment of Filipino troops made a last stand at the Caloocan Cathedral, leading to an intense but short close-quarters engagement where American forces managed to rout the defenders. A U.S. military officer, caught up in the excitement, shouted "On to Malolos!"; this led undisciplined American troops to start chasing the retreating defenders on their own initiative, only being pulled back by the efforts of infuriated staff officers. Aftermath American casualties totaled 6 men killed and 61 wounded. As noted by historian Brian McAllister Linn, the capture of Caloocan led to the southern terminus of the Manila-Dagupan Railroad falling into the hands of the Eighth Army Corps, along with five locomotives, fifty passenger cars and a hundred freight cars. It also compounded the Philippine Revolutionary Army's woes after their defeat just five days prior, which in the view of senior Filipino officers was exacerbated by the fact that their troops had "once again failed to hold field fortifications against troops attacking over open ground." However, the vast majority of Filipino forces in Caloocan had managed to survive intact, and