The Philippine-American War
The United States army greatly outnumbered the Filipino fighters. However, almost all the Filipino population showed great support for the war, which they hoped would finally give them the independence they wanted. They also knew the land much better then the U.S did. The Americans, however, had mixed feelings about the war and were constantly debating the idea of fighting the Filipinos. The U.S army was said to have shot unarmed U.S. citizens for supporting the Filippinos in the war. This caused the civilian death toll to grow to as much as two hundred thousand casualties from complications of the war.
All in all, the war took around three years of fighting, much longer than it should have. Some notable battles were the Battle of Milina Bay and the Battle of Santa Cruz. The death count is estimated to be around nineteen to twenty thousand Filipinos and four thousand Americans.
While very stretched out, the Americans eventually won and took control of the entire Philippines. After the fighting concluded, which was caused in part by Aguiinaldo being captured in the year 1901, the new U.S president Theodore Roosevelt gave full amnesty to the people of the Philippines.
Some people didn't think the war was worth it.