Visayas Mindanao The Battle of Lonoy, also known as the Lonoy Massacre, was a surprise attack in 1901 during the Philippine–American War when over 400 Filipino revolutionaries were killed by United States Armed Forces.

They were poorly armed, with daggers, machetes, and spears and few firearms.

The American force learned of the ambush from a pro-American local, Captain Francisco Acala, the last Spanish Mayor of Jagna.

All but seven were killed, a total 406, including the commander, Captain Gregorio "Guyo" Casenas.

Americans casualties were three killed and ten wounded, which came toward the end when the Filipinos launched a counter-attack.