Complex sentence: He then served as State Inspector at Veracruz, part of a Mexican mission to England, and director of the Mexican School of Artillery until 1827 in that year he went to Tamaulipas and Texas.
Split into simpler sentences: He then served as State Inspector at Veracruz, part of a Mexican mission to England, and director of the Mexican School of Artillery until 1827. In that year he went to Tamaulipas and Texas.