Orville Elias Babcock was an 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...

 General in the Union Army

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...

. Immediately upon graduating third in his class as United States Military Academy

United States Military Academy

The United States Military Academy at West Point is a four-year coeducational federal service academy located at West Point, New York. The academy sits on scenic high ground overlooking the Hudson River, north of New York City...

 in 1861, Babcock would go onto serve efficiently in the Corps of Engineers throughout the Civil War and was promoted to Brevet

Brevet

Brevet may refer to:* Brevet , a temporary authorization for a person to hold a higher rank* Brevet , a long-distance bicycle ride with check-point controls* Aircrew brevet, a Royal Air Force and British Army badge...

 Brigadier General

Brigadier General

Brigadier general is a senior rank in the armed forces. It is the lowest ranking general officer in some countries, usually sitting between the ranks of colonel and major general. When appointed to a field command, a brigadier general is typically in command of a brigade consisting of around 4,000...

 in 1865. Babcock served as aide-de-camp

Aide-de-camp

An aide-de-camp is a personal assistant, secretary, or adjutant to a person of high rank, usually a senior military officer or a head of state...

 for Lieut. Gen. Ulysses S. Grant and participated in the Overland Campaign

Overland Campaign

The Overland Campaign, also known as Grant's Overland Campaign and the Wilderness Campaign, was a series of battles fought in Virginia during May and June 1864, in the American Civil War. Lt. Gen. Ulysses S. Grant, general-in-chief of all Union armies, directed the actions of the Army of the...

. After Grant became President in 1869, Babcock was appointed his Private Secretary

Secretary to the President of the United States

The Secretary to the President was an old 19th and early 20th century White House position that carried out all the tasks now spread throughout the modern White House Office...

--in modern terms, the chief of staff—and served until 1876.