During the 1863 Vicksburg Campaign, he was accused of selling army provisions to the Confederates near Vicksburg while his own men were underfed. In April 1863, he fought in the Battle of Port Gibson and in May 1863, at the Battle of Raymond. Later in May, he was placed in command of the District of Northeast Louisiana when guerillas were causing problems on the leased plantations there. Troops from his command participated in the Battle of Milliken's Bend in June, one of the first battles to involve United States Colored Troops.