Complex sentence: Assigned to support Hébert's brigade of McCulloch's division in northwest Arkansas in December, 1861, the unit was stationed at the Leetown portion of the Battle of Pea Ridge on March 7--8,1862.
Split into simpler sentences: Assigned to support Hébert's brigade of McCulloch's division in northwest Arkansas in December, 1861. The unit was stationed at the Leetown portion of the Battle of Pea Ridge on March 7--8,1862.