The Battle of Manila (Filipino: Labanan sa Maynila; ), the first and largest battle of the Philippine–American War, was fought on February 4–5, 1899, between 19,000 American soldiers and 15,000 Filipino armed militiamen. Armed conflict broke out when American troops, under orders to turn away insurgents from their encampment, fired upon an encroaching group of Filipinos. Philippine President Emilio Aguinaldo attempted to broker a ceasefire, but American General Elwell Stephen Otis rejected it, and fighting escalated the next day. It ended in an American victory, although minor skirmishes continued for several days afterward. Disposition of forces Filipino forces After the surrender of Manila to American forces by the Spanish in 1898, General Aguinaldo demanded the occupation of a line of blockhouses on the Zapote Line, which had been the Spanish defensive perimeter. General Otis initially refused this but later said that he would not object unless overruled by higher authority. It was estimated at the time that about 20,000 Filipino troops were surrounding Manila, with their distribution and exact composition only partially known. American forces U.S. Army forces numbered some 800 officers and 20,000 enlisted men. Of these, the Army deployed some 8,000 in Manila and 11,000 in a defensive line inside the Zapote line. The remaining American troops were in Cavite or in transports off Iloilo. First shots Sources generally agree that the first shots were fired by Private William Walter Grayson (April 9, 1876, England - March 20, 1941, San Francisco, United States), an Englishman who had migrated to Nebraska with his parents c. 1890. Having worked as a hostler, he had enlisted as a volunteer soldier in Lincoln, Nebraska, in May 1898, a month after the Spanish–American War erupted, and had deployed with his unit to the Philippines in June 1898. Grayson's unit, the First Nebraska Volunteer Infantry under Colonel John M. Stotsenburg, had been encamped in Santa Mesa, Manila, since December 5, 1898. During their encampment, there had been incidents on and around the San Juan Bridge, located just to the east of their encampment area. On the morning of February 4, Stotsenburg said, "Your orders are to hold the village. If any armed men come into our lines order them out. If they persist in coming, summon enough men to arrest them. In case an advance in force is made, fall back to the pipeline outpost and resist the occupation of the village by all