He fought alongside the Spaniards in the Philippine Revolution but later switched sides and joined Emilio Aguinaldo's revolutionary cabinet.

After he left the revolutionary government, he co-founded the Federalista Party and became a founding member of the Philippine Independent Church.

Before the Hispanization of the Philippine natives, his surname was Mangalindan (a contraction of Magaling na daan or good road).

[2] When 270 Spanish navy infantry prisoners were handed to General Aguinaldo at Teatro Caviteño following the Battle of Alapan at Imus on May 28, 1898,[4] he was being held in the tower of the Osorio family estate in Cavite Puerto for being accused of being a spy.

He later served as a delegate to the Malolos Congress, In September 26, 1898, Emilio Aguinaldo named Buencamino as secretario de fomento (in English: Secretary of Development).

Buencamino, Pedro Paterno, and other powerful Malolos Congress members passed a resolution requesting that Aguinaldo disavow Mabini's position and remove him as prime minister.

[6] When Buencamino and Paterno formed a group known as the "Pacificados" and organized the Asociación de Paz (League for Peace), the Philippine–American War was still raging.

Guerrero, Cayetano Arellano, Rafael Palma, Tomas del Rosario, Justo Lukban and Pascual H. Poblete.