Complex sentence: In 1719, the French sent the first military to the Territory, when Ensign Nicolas Chauvin de la Frénière and two others were sent to patrol the area and in 1720, the French established Opelousas Post as a major trading organization for the developing area.
Split into simpler sentences: In 1719, the French sent the first military to the Territory, when Ensign Nicolas Chauvin de la Frénière and two others were sent to patrol the area. In 1720, the French established Opelousas Post as a major trading organization for the developing area.