Manuel de Sandoval, a native of Santa Fe, New Mexico, advanced from cadet to captain of grenadiers in the Santa Fe regiment. After twenty years' service in the army he was appointed governor of Coahuila in 1727 and at the beginning of 1734 was appointed governor of Texas to succeed Juan Antonio Bustillo y Ceballos. Los Adaes was the capital of Texas, but Sandoval spent most of his time in San Fernando de Béxar, which was suffering from continued attacks of the Apaches. During his absence in 1735 Louis Juchereau de St. Denis, French commandant at Natchitoches, moved the French fort to the west side of the Red River despite the remonstrances of Sandoval and José Gonzales, his second in command at Los Adaes. As a result of the French encroachment, the viceroy removed Sandoval in September 1736, replacing him with Carlos Franquis de Lugo, who ordered Sandoval arrested and charged him with seven counts of official misconduct. In 1737 both governors were called upon to file official accounts of their administrations. Both were acquitted of the charges against them, although Sandoval paid a $500 fine for not residing at Los Adaes and for not keeping books. In 1741 he was released from prison and declared capable of further service for the king. He remained in Mexico City, where he served in the capacity of sergeant major in the Regimento Urbano del Comercio until his death. The official investigation of the Sandoval case filled thirty volumes, collected with forty additional volumes on previous happenings in Texas. This material was used in later negotiations among Spain, France, and the United States concerning the eastern boundary of Texas.