Philip Henry Sheridan was a career United States Army

United States Army

The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

 officer and a Union

Union Army

The Union Army was the land force that fought for the Union during the American Civil War. It was also known as the Federal Army, the U.S. Army, the Northern Army and the National Army...

 general in the American Civil War

American Civil War

The American Civil War was a civil war fought in the United States of America. In response to the election of Abraham Lincoln as President of the United States, 11 southern slave states declared their secession from the United States and formed the Confederate States of America ; the other 25...

. His career was noted for his rapid rise to major general

Major general (United States)

In the United States Army, United States Marine Corps, and United States Air Force, major general is a two-star general-officer rank, with the pay grade of O-8. Major general ranks above brigadier general and below lieutenant general...

 and his close association with Lt. Gen.

Lieutenant General (United States)

In the United States Army, the United States Air Force and the United States Marine Corps, lieutenant general is a three-star general officer rank, with the pay grade of O-9. Lieutenant general ranks above major general and below general...

 Ulysses S. Grant

Ulysses S. Grant

Ulysses S. Grant was the 18th President of the United States as well as military commander during the Civil War and post-war Reconstruction periods. Under Grant's command, the Union Army defeated the Confederate military and ended the Confederate States of America...

, who transferred Sheridan from command of an infantry division in the Western Theater

Western Theater of the American Civil War

This article presents an overview of major military and naval operations in the Western Theater of the American Civil War.-Theater of operations:...

 to lead the Cavalry Corps of the Army of the Potomac

Army of the Potomac

The Army of the Potomac was the major Union Army in the Eastern Theater of the American Civil War.-History:The Army of the Potomac was created in 1861, but was then only the size of a corps . Its nucleus was called the Army of Northeastern Virginia, under Brig. Gen...

 in the East. In 1864, he defeated Confederate

Confederate States Army

The Confederate States Army was the army of the Confederate States of America while the Confederacy existed during the American Civil War. On February 8, 1861, delegates from the seven Deep South states which had already declared their secession from the United States of America adopted the...

 forces in the Shenandoah Valley

Valley Campaigns of 1864

The Valley Campaigns of 1864 were American Civil War operations and battles that took place in the Shenandoah Valley of Virginia from May to October 1864. Military historians divide this period into three separate campaigns, but it is useful to consider the three together and how they...

 and his destruction of the economic infrastructure of the Valley, called "The Burning" by residents, was one of the first uses of scorched earth

Scorched earth

A scorched earth policy is a military strategy or operational method which involves destroying anything that might be useful to the enemy while advancing through or withdrawing from an area...

 tactics in the war.