USA HISTORY

Detailed explanation-1: -Martín de Alarcón was the Governor of Coahuila and Spanish Texas from 1705 until 1708, and again from 1716 until 1719. He founded San Antonio, the first Spanish civilian settlement in Texas.

Detailed explanation-2: -Alarcón, though governor for just three short years, played a pivotal role in Texas history. In the spring of 1718 he led settlers across the Rio Grande and assisted in the founding of San Antonio de Valero mission and San Antonio de Béxar presidio.

Detailed explanation-3: -Alarcón, Martín de (c. 1691–c. 1721) | Encyclopedia.com.

Detailed explanation-4: -The first Spanish-speaking settlers began to group around the San Antonio River in 1718 when the mission and presidio (fort) were established.