Complete the following sentence: Captain Diego de Holguín participated in the conquest of
Guatemala, Izalco, Cuzcatlan y bajo el mando de Pedro de Alvarado. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Along with Gonzalo de Alvarado, was one of the founders of the first settlement of San Salvador, next to a fortress Cuzcatlecos, and became its first mayor in April 1525.