The President of the United States of America, in the name of Congress, takes pleasure in presenting the Medal of Honor to First Lieutenant Menomen O’Donnell, United States Army, for extraordinary heroism on 22 May 1863 while serving with Company A, 11th Missouri Infantry, in action at Vicksburg, Mississippi. First Lieutenant O’Donnell voluntarily joined the color guard in the assault on the enemy’s works when he saw indications of wavering and caused the colors of his regiment to be planted on the parapet. At Fort DeRussey, Louisiana, on 14 March 1864, he voluntarily placed himself in the ranks of an assaulting column (being then on staff duty) and rode with it into the enemy’s works, being the only mounted officer present, was twice wounded in battle.