Complex sentence: Gen. Jacob D. Cox took command of a brigade, composed of Ohio volunteer regiments, which he titled the "Kanawha Brigade" in reference to its duty in the Kanawha Valley in West Virginia.
Split into simpler sentences: Gen. Jacob D. Cox took command of a brigade, composed of Ohio volunteer regiments. He titled his command "Kanawha Brigade" in reference to its duty in the Kanawha Valley in West Virginia.