Leonard Wood, a Harvard-trained physician, earned a Medal of Honor for his valorous contribution in the effort of the U.S. Army to hunt down the elusive Apache chief Geronimo (http://www.fold3.com/page/630019442_geronimo/) in 1886. He carried messages over 100 miles through the rugged and hostile terrain of the southwest, and led an engagment of hand-to-hand combat with Apaches.
Wood advanced through the army ranks, but gained notoriety when he assisted Theodore Roosevelt to assemble, train, and lead the First Volunteer Cavalry (known better as the Rough Riders), who would perform ably against the Spanish in 1898 in such battles as Las Guasimas in Cuba. Later in the Spanish-American War, Wood attained command over the 2nd Brigade, Cavalry Division, V Corps, which was victorious at San Juan Hill and Kettle Hill.
Wood became a Brigadier General of regular Army troops before he left to command the Philippines Division in 1902. A year later, he was promoted to Major General and provincial governor over Moro, a territory in the Philippines. Wood participated in the first Battle of Bud Dajo that resulted in numerous deaths among the Moros.
In 1910 Wood became Army Chief of Staff, a rare feat for a medical officer, though he acquitted himself well by promoting army preparedness and a more mobile army. THe poilitical winds reversed Wood's fortunes in 1914, as it was then that he was replaced as Army Chief of Staff. During World War I, Major General Wood was put in charge of the training of soldiers in the 10th and 89th Divisions at Camp Funston in Kansas. In 1915 he published a book entitled The Military Obligation of Citizenship. He ended the war as a Lieutenant General.
In the 1920s he served as Governor General of the Philippines.