When the revolution against Spain broke out, Tecson was an officer in the Spanish Civil Guards (
Guardia Civil) in San Miguel.
Background In 1896, Tecson co-founded the Arao (
Balangay Arao) branch of a secret society-turned-revolutionary government, the
Katipunan (
Kataastaasang Kagalanggalangang Katipunan, or
KKK)(
Filipino:
nang mga anak nang bayan), which operated out of San Miguel. On December 14, 1897, the
Pact of Biak-na-Bato, was signed in Tecson's residence. It called for a truce between Spanish Colonial Governor-General
Fernando Primo de Rivera, and insurgent leader,
Emilio Aguinaldo, to end the
Philippine Revolution. Aguinaldo and his fellow revolutionaries were given amnesty and money and agreed to go into voluntary exile in
Hong Kong. (Aguinaldo later used the money to purchase firearms.) Following Aguinaldo's return from exile in
Hong Kong, Tecson defected from the Civil Guards and joined Aguinaldo's Republican Army as a captain. Following the
Cry of Nueva Ecija, he fought alongside
General Manuel Tinio (especially in
Nueva Ecija) and General
Francisco Macabulos. He himself was eventually ranked brigadier general under del Pilar.
Battle of San Miguel On May 24, 1898, Tecson launched attacks on the Spanish Civil Guard garrisons in San Miguel and
San Rafael, Bulacan (collectively known as the
Battle of San Miguel); which ended with the Spanish force's surrender on June 1, 1898. ==Wartime politics==