 Complete the following phrase:  Compared to the Eastern Theater of the war, Lincoln exercised less direct control over operations that took place West of the Appalachian Mountains. At the end of 1861, Lincoln ordered Don Carlos Buell, commander of the Department of the Ohio, and Henry Halleck, Frémonts replacement as commander of the Department of the Missouri, to coordinate support with Unionists in Kentucky and Eastern Tennessee. General Ulysses S. Grant quickly earned Lincolns attention, winning the first significant Union victory at the 