The Siege of Baler (July 1, 1898 – June 2, 1899) was a battle of the Philippine Revolution and concurrently the Spanish–American War and the Philippine–American War. Filipino revolutionaries laid siege to a fortified church manned by colonial Spanish troops in the town of Baler, Philippines for 11 months, or 337 days. The battle is considered part of the Spanish–American War since the Filipinos were allied with the United States at the outset. That war ended in December 1898 with Spain's surrender and annexation of the Philippines to the United States. However, cut off from communications with their own government and military, the Spanish forces continued their defense against the Filipino forces until 1899.