Wood, Leonard (1860–1927)

US soldier and physician. Born in Winchester, New Hampshire, after graduating from Harvard medical school in 1884, he participated in the campaign against the American Indian chief Geronimo in 1886, served as President William McKinley's physician and, with Theodore Roosevelt, organized the first US Volunteer Cavalry – the Rough Riders – for action against the Spanish in Cuba in 1898. Wood arose to become army chief of staff in 1910 but was passed over for command of the American Expeditionary Force during World War I.