Hugh Boyle Ewing
Hugh Boyle Ewing, , was a diplomat, author, attorney, and Union Army general during the American Civil War. He was a member of the prestigious Ewing family, son of Thomas Ewing, the eldest brother of Thomas Ewing, Jr. and Charles Ewing, and the foster brother and brotherinlaw of William T. Sherman. General Ewing was an ambitious, literate, and erudite officer who held a strong sense of responsibility for the men under his command. He combined his West Point experience with the Civil War system of officer election.
Hugh Ewing was born in Lancaster, Ohio. He was educated at the U.S. military academy, but was forced to resign on the eve of graduation after failing an engineering exam, which was a major embarrassment to his family. While a member of the cadet corps, he was close friends with future Union generals John Buford Jr., Nathaniel C. McLean, and John C. Tidball. His father appointed Philip Sheridan to the open seat.
Source: Wikipedia