The Union assault on Petersburg, Virginia, reached its climax on this day. The 4th Wisconsin Light Artillery and 5th, 6th, 7th, 19th, 36th, 37th and 38th Wisconsin Infantry regiments took part in this battle. On June 18, the 36th Wisconsin Infantry led an attack on Confederate fortifications but was cut down after charging from the trenches. It lost five officers and 111 enlisted men either killed or wounded. Many wounded laid on the field all day until they could be rescued under cover of darkness.