Harrison was born on a farm by the Ohio River and graduated from Miami University in Oxford, Ohio. After moving to Indianapolis, he established himself as a prominent local attorney, Presbyterian church leader, and politician in Indiana. During the American Civil War, he served in the Union Army as a colonel, and was confirmed by the U.S. Senate as a brevet brigadier general of volunteers in 1865. The new partners worked together until Harrison entered the Union Army after the start of the American Civil War. After the election, Harrison never spoke to Dudley again.Harrison had made no political bargains, but his supporters had made many pledges on his behalf. When Boss Matthew Quay of Pennsylvania, who was rebuffed for a Cabinet position for his political support during the convention, heard that Harrison ascribed his narrow victory to Providence, Quay exclaimed that Harrison would never know 'how close a number of men were compelled to approach...the penitentiary to make him president'.