Complex sentence: In 1846, at the beginning of the Mexican War, Holland was named Captain of the 17th Ranger Company of the 2nd Regiment of Texas Mounted Volunteers, but he only served briefly due to disability from illness at Matamoros.
Split into simpler sentences: In 1846, at the beginning of the Mexican War, Holland was named Captain of the 17th Ranger Company of the 2nd Regiment of Texas Mounted Volunteers. He only served briefly due to disability from illness at Matamoros.