He finished a teacher's course and taught for some time in Silang, Cavite in 1875.When the revolution broke out, he immediately took arms and figured in several bloody arrangements against the Spaniards. With only 30 men from Imus, Garcia boldly attacked the Spanish fort in Silang in February 1897. They were armed with bolos, daggers, spears, and guns. The insurgents assaulted the Spanish troops and overran several trenches. He was promoted as a colonel for the victory and heroism he showed during the encounter. He was also promoted to the rank of Brigadier General and was given command of a battalion station in Manila.
Among the battles he led were the Battle of Silang on August 30, 1896 (Filipino victory), Battle of Mt. Puray in February 1897 (Filipino victory), Battle of Pasong Santol on March 22 to 25, 1899 (Spanish Victory), Battle of Marilao River on March 27, 1899 (US Victory), and Battle of Caloocan on February 5, 1899 (US Victory).
During the American occupation, he was captured when he was gravely ill in bed. He was given pardon and named as the Municipal President of Imus and served from 1903 to 1905 and as Justice of Peace from 1906 to 1907. He also served as Superintendent of an Agricultural Colony in Cavite.
- Quirino, Carlos. Who's who in Philippine History. Manila: Tahanan Books, 1995.
- “Today in Philippine History, July 27, 1856, Pantaleon Garcia was born in Imus, Cavite”.The Kahimyang Project.(Accessed on 27 July 2015).
- “Brigadier General Pantaleon Garcia”.Republic of the Philippines Presidential Museum and Library.(Accessed on 27 July 2015).