'A career United States Army officer and Mexican-American War veteran, Hooker was appointed in 1861 as a brigadier general of the Union Army. Hooker began the war commanding a division of the Army of the Potomac around Washington DC under Major General George McClellan.
One of the most immodest and immoral of the high Union commanders, "Fighting Joe" Hooker frequently felt slighted by his superiors and requested to be relieved of duty. The Massachusetts native and West Pointer (1837) had been posted to the artillery but was serving as a staff officer when he won three brevets in Mexico. Unfortunately for his later career he testified against Winfield Scott before a court of inquiry on the Mexican War. After a two-year leave he resigned on February 21, 1853, to settle in California where he was in the farming and land businesses. 
Hooker was born in Hadley, Massachusetts on November 13, 1814, the son of Joseph Hooker, an unsuccessful businessman, and Mary Seymour. His great-grandfather, Joseph Hooker, fought in the French and Indian War (1755–1763), and his grandfather, also of the same name, was a captain in the Continental army during the Revolutionary War (1775–1783). He was of entirely English ancestry, all of which had been in New England since the early 1600s. His initial schooling was at the local Hopkins Academy.
At the outbreak of the Civil War, Hooker was a bachelor with a reputation for drinking, gambling, womanizing, and hotheadedness.
He graduated from the United States Military Academy in 1837, ranked 29th out of a class of 50, and was commissioned a second lieutenant in the 1st U.S. Artillery.
As commander of the Army of the Potomac, Hooker improved conditions for the soldiers including food, medical care, and leave. However, disagreements with his staff and commanders along with a loss to Confederate commander General Robert E. Lee at Chancellorsville, Virginia led to Hooker’s resignation as the commander of the Army of the Potomac.
His assignments included:
Brevetted major general in the regular army for Chattanooga, he was mustered out of the volunteers on September 1, 1866, and two years later was retired with the increased rank of major general. Always popular with his men, he lacked the confidence of his subordinate officers and was quarrelsome with his superiors. His nickname, which he never liked, resulted from the deletion of a dash in a journalistic dispatch that was discussing the Peninsula Campaign and "Fighting" was thereafter linked to his name. Popular legend has it that his name was permanently attached to prostitutes from his Civil War actions in rounding them up in one area of Washington. He died in Garden City, New York, on October 31, 1879, and is buried in Cincinnati. (Herbert, Walter H., Fighting Joe Hooker) 
Mustered out of service in 1866, he retired from the Army in 1868, He died on a visit to Garden City, New York, and is buried in Spring Grove Cemetery, Cincinnati, Ohio,
While visiting Garden City, New York in 1879, he died from apoplexy at the age of 64. 
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Categories: United States Military Academy | Union Army Generals, United States Civil War | Battle of Antietam | Battle of Chancellorsville | First Battle of Chattanooga | Namesakes US Counties | Spring Grove Cemetery, Cincinnati, Ohio | United States Army, Mexican-American War | Army of the Potomac, Union Army, United States Civil War | Wounded in Action, United States of America, United States Civil War