Complex sentence: In December 1917, Kornilov took command of the combat forces within the army and Alekseyev took charge of political and financial matters.A fter the death of Kornilov in April 1918 Alexeyev led Volunteer Army back in the Don region.
Split into simpler sentences: In December 1917, Kornilov took command of the combat forces within the army and Alekseyev took charge of political and financial matters. After the death of Kornilov in April 1918 Alexeyev led Volunteer Army back in the Don region.