Hostilities broke out on February 4, 1899, after two American privates killed three Filipino soldiers as American forces launched a major attack in San Juan, a Manila suburb. This began the Philippine–American War, which would cost far more money and take far more lives than the Spanish–American War. Some 126,000 American soldiers would be committed to the conflict; 4,234 Americans died, as did 12,000–20,000 Philippine Republican Army soldiers who were part of a nationwide guerrilla movement of at least 80,000 to 100,000 soldiers.