William “Bucky” O’Neill is often remembered for the uniform he wore in the Spanish-American War. But before he became a captain in the Rough Riders, he was a familiar figure in Prescott’s civic life: a newspaper editor, Yavapai County sheriff and elected official. His story links the city’s territorial-era politics to a battle fought thousands of miles away.
O’Neill was born in St. Louis in 1860 and came to Arizona as a young man. In Prescott, he worked as a journalist and entered public life. He served as sheriff of Yavapai County and was elected mayor of Prescott. Those roles put him in the middle of a growing community’s practical concerns, at a time when Arizona was still a territory and local offices carried much of the responsibility for public order and municipal affairs.
From local office to a volunteer regiment
In 1898, the United States went to war with Spain. O’Neill joined the First U.S. Volunteer Cavalry, the regiment that became known as the Rough Riders. The unit’s roster drew men from different walks of life, including cowboys, ranchers and college athletes. O’Neill served as a captain.
The regiment’s reputation grew from its service in Cuba, especially during the fighting around Santiago. Its best-known engagement was the July 1 assault on Kettle Hill, part of the larger battle commonly associated with San Juan Hill. O’Neill was killed during the fighting that day, at 38. His death made a local political career part of a much larger national story about the war and the volunteer soldiers who fought in it.
That distinction matters when the story is told from Prescott. O’Neill did not arrive in Arizona as a celebrity soldier. His public standing came first from work in the territory: reporting, law enforcement and elected service. The war made his name famous beyond Arizona, but his connection to Prescott was already established.
A life remembered in more than one setting
O’Neill’s biography can be reduced to a dramatic final chapter—an Arizona captain killed in a celebrated charge—but that framing leaves out the civic career that preceded it. Prescott was not simply his hometown on a memorial label. It was where he held public office and built the local reputation that made his departure for war consequential to the community.
His story also reflects the era’s overlapping forms of public service. A newspaper editor could become a lawman, a local politician and then a volunteer officer. The paths were not identical, and the war brought dangers that civic office did not. Yet O’Neill’s career shows how territorial Arizona’s leaders could move between local institutions and national events.
More than a century later, the Rough Riders remain a familiar part of American military history. O’Neill’s Prescott years offer a more grounded way to understand that legacy: not only as a battle story, but as the life of a local public servant whose career began in the community he represented. His story is one of Prescott’s connections to the territorial past—and a reminder that national history often starts with people whose first responsibilities were close to home.
