Complex sentence: While in Virginia, command level officers with formal military training were assigned to the regiment, to include West Point graduate Seth Maxwell Barton who was assigned as lieutenant colonel, and with Virginia Military Institute graduate Thomas Middleton Semmes assigned as regimental adjutant.
Split into simpler sentences: While in Virginia, command level officers with formal military training were assigned to the regiment, to include West Point graduate Seth. M. Barton who was assigned as lieutenant colonel, and with Virginia Military Institute graduate Thomas Middleton Semmes assigned as regimental adjutant.