Complex sentence: In May 1,1811, Dominguez return to Nacogdoches and imprisoned Guadiana, then he was appointed Interim and Lieutenant Governor of Texas by Joaquín de Arredondo in December 15,1813, assuming the charge in 1814.
Split into simpler sentences: In May 1,1811, Dominguez return to Nacogdoches and imprisoned Guadiana. Then, he was appointed Interim and Lieutenant Governor of Texas by Joaquín de Arredondo in December 15,1813, assuming the charge in 1814.