Short answers, pulled from the story.
Lieutenant General Ulysses S. Grant took command of all Union armies in May 1864 while Philip Sheridan led the Army of the Shenandoah after receiving orders to defeat Confederate forces.
The operations started on the 15th of May 1864 when Franz Sigel moved toward Lynchburg and concluded with the Battle of Waynesboro on the 2nd of March 1865.
Confederate and Union troops fought throughout the Shenandoah Valley including locations such as Strasburg, Staunton, Winchester, and Chambersburg Pennsylvania.
Philip Sheridan ordered the destruction of agricultural resources to deny the Confederacy means of feeding its armies in Virginia and destroying their economic foundation.
Franz Sigel commanded 10,000 men when he moved up the Valley toward Lynchburg on the 15th of May 1864 before his forces were intercepted by Confederate troops.