Juan Seguin (1806-1890) was a political and military figure of the Texas Revolution and Republic of Texas. He did not have much schooling, but his father encouraged him to read and write. Seguin began his career of public service by helping his mother run the family post office in San Antonio while his father served in Congress. He was elected as a council member in December 1828. He served on various electoral boards before he was elected alcalde (town’s chief executive) in December 1833. He acted as the political chief of the Department of Bexar when the previous chief became ill and retired.

Seguin’s military career started in 1835. He responded to the Federalist state governor’s call for support against the Centralist army by leading troops to Monclova. After the battle of Gonzales in October 1835, Stephen F. Austin granted Seguin a captain’s commission. His company of thirty-seven men was partly responsible for scouting and supply operations for the revolutionary army. It also participated in the attack on General Cos’s army at San Antonio. Seguin entered the Alamo with the other Texan military when Antonio Lopez de Santa Anna’s army arrived, but he was sent out as a courier. When he got to Gonzales, he organized a company that helped Sam Houston’s army and they were the only Tejano unit to fight at the battle of San Jacinto. Seguin accepted the Mexican surrender of San Antonio on June 4, 1836. He served as the city’s military commander through the fall of 1837, when he was elected to the Texas Senate.

Source: Juan Nepomuceno Seguín #2
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