Isaac Ingalls Stevens (March 25, 1818 – September 1, 1862) was an American military officer and politician. He served as governor of the Territory of Washington from 1853 to 1857, and later as its delegate to the United States House of Representatives; he was also Superintendent of Indian Affairs. He was a polarizing figute, whose tenure as governor overwhelms Washington's territorial history; accounts of him condemn or applaud. A New Englander, the diminuitive Stevens graduated from Phillips Academy in 1833. He attended West Point, where he graduated at the top of his class. He became career military. He was adjutant of the Corps of Engineers during the Mexican-American War, performing with distinction in combat. He swiftly earned wartime promotions to Captain and Major, and received severe wounds in combat. He would in 1851 publish a book on his experiences during the war. Beween 1841 and 1849 he was superintendent of fortifications on the New England coast, and was given command of the coast survey until 1853. His support of fellow Mexican War veteran Franklin Pierce led him to be rewarded by the new President Pierce by being made governor and Superintendant of Indian Affairs for the new Washington Territory. Stevens also undertook to use his travel west as an opportunity to survey a railroad route across the northern United States (he was an experienced engineer, although his connections with President Pierce and Secretary of War Jefferson Davis doubtless aided his bid.)He would publish the results of his survey in 1855. His governorship would prove controversial. Aggressive in diplomacy as well as war, he compelled Native American tribes of Washington Territory by both intimidation and force, and was not above forging signatures on treaties. His tenure resulted in the Treaties of Medicine Creek, Treaty of Hellgate, Treaty of Neah Bay, Treaty of Point Elliott, Point No Point Treaty, and Quinault Treaty. He imposed martial law to remove dissent fdrom both the Indians and Whites who opposed his policies. He jailed opposing judges, and raised a private army - for which he was convicted for contempt of court, rebuked by the President of the United States. Despite opposition, he was popular enoug among white settlers in the Territory to be elected as the territory's delegate to the United States Congress in 1857 and 1858. During the American Civil War, he held several Union commands and was - at the time of his death - under consideration for appointment to command the Army of Virginia. He was killed at the Battle of Chantilly, leading his men from the front, carrying the fallen colors of one of his regiments against Confederate positions. He was posthumously promoted to Major General.