Union General Alexander Bydie Dyer graduated from West Point in 1837. He was ranked sixth among his graduating class of 50 cadets. Dyer saw battle action in the Mexican War but none in the US Civil War. In that war he worked under Quartermaster General Meigs keeping Union armies supplied with munitions. Dyer is best remembered as being the first Union officer to purchase a Gatling Gun.
Union General Alexander Hayes graduated from West Point in 1844. Among the 24 cadets graduating that year, Hayes was ranked 20th. Hayes saw action in many large battles in the Eastern Theater. As an aside, he was a close personal friend of General US Grant.
Union General Alexander Chambers graduated from West Point in 1853. He was ranked 43rd among his graduating class of cadets that numbered 52. Chambers served in the Western Theater of the US Civil War. He served at the battles of Shiloh, Iuka and the siege of Vicksburg.
Union General Alexander McDowell McCook graduated from West point in 1852. He ranked 30th in a graduating class of 43 cadets. McCook saw early fighting in the West when he was under the command of General Don Carlos Buell. He met the army of Confederate General Braxton Bragg in the unintended battle at Perryville.
Union General Benjamin Butler did not graduate from West Point. He did have a college education and graduated from Colby College in Maine. He also passed the bar in Massachusetts and practiced law before the US Civil War.
Union General James Birdseye McPherson graduated from the West Point in 1853. He was ranked first in his class of 52 graduates.
Union General Schuyler Hamilton graduated from West point in 1841. Among the graduating class of 52 cadets, Schuyler ranked 24th. Schuyler was the grandson of Alexander Hamilton. Schuyler saw action in the Western Theater, at Corinth, Mississippi.Due to illness he was forced to resign in 1863.
Union Major General William T. Sherman graduated from West Point in 1840. Sherman ranked 6th in his class.
General Philip Henry Sheridan graduated from West Point in 1853. He ranked 34th out of a class of 52.
Union General Issac Ingalls Stevens graduated from West Point in 1839. Among the graduating class of 31, General Stevens ranked first. General Stevens was killed at the Battle of Chantilly in 1862.
Union General Jacob Ammen graduated from West Point in 1831. He ranked 12th in his graduating class of 33 cadets. General Ammen was most active in military operations in the Western Theater.
General Ulysses S. Grant
Union General John Porter Hatch was a West Point graduate in 1845. Among the 41 graduating cadets that year, Hatch was ranked 17th. Hatch saw war duty in the Eastern Theater. He served for example in the Peninsula campaign.