Samuel M. Whitside was a United States Cavalry officer who served from 1858 to 1902. He commanded at every level from company to department for 32 of his 43 years in service, including Army posts such a Camp Huachuca, Jefferson Barracks, and Fort Sam Houston, the Departments of Eastern Cuba and Santiago and Puerto Principe, Cuba, commanded a provisional cavalry brigade, a squadron in the 7th Cavalry Regiment, and a troop and platoon in the 6th Cavalry Regiment. The pinnacle of his career was serving as the commanding general of the Department of Eastern Cuba before retiring in June 1902 as a brigadier general in the U.S. Army.