Sieben-Tage-Schlacht
In the summer of 1862 Buchanan served with distinction in Seven Days Battles and was twice brevetted. He participated in the Peninsula Campaign, including the Battle of Yorktown, and the Seven Days Battles, including the Battle of Gaines' Mill, the Battle of Glendale, and the Battle of Malvern Hill. He then fought in the Northern Virginia Campaign in the Second Battle of Bull Run.