On March 4, 1826, Major General Jacob J. Brown, Commanding General of the Army, issued Special Order No. 13 which he instructed Bvt. General Henry Atkinson, Commanding Officer of the 6th Infantry Regiment , and Bvt. Major General Edmund P. Gaines, Commander of the Western Department of the Army,”…to select some position near the mouth of Missouri River [net exceeding a range of 20 miles] which in their judgement may be deamed [sic] the best for the establishment of an infantry school of instruction.”That was the inception of Jefferson Barracks Military Post. It was an important and active U.S. Army installation from 1826 through 1946. It is the oldest operating U.S. Military installation west of the Mississippi River. It is presently used as a base for the Army and Air National Guard.The first conflict that the soldiers of Jefferson Barracks were involved in happened in 1832 and it was known as the Black Hawk War. During the Civil War it was used as a military hospital for both sides as well as a recruitment center for the north. By the end of the war they had treated well over 18,000 soldiers.The Jefferson Barracks Military Post Cemetery was established in 1826. The first known burial was Elizabeth Ann Lash, the infant child of an officer stationed there. In 1866 it became a United States National Cemetery.July 31,2018, my daughter in law, grandson and myself visited the Missouri Civil War Museum located in Jefferson Barracks located in the old Jefferson Barracks 1905 Post Exchange Building. Since its opening in June 2013, it has become one of the largest Civil War Museums in the U.S. Its focus is entirely on Missouri’s role in the American Civil War..The 22,000 square foot museum is filled with over one thousand artifacts and several films are available for your viewing. Each gallery and exhibit tells a story of Missouri in the American Civil War, from guerrillas and jayhawkers to life on the home front. There are also galleries on Jefferson Barracks history and the post-war era.. Pics above are of some of the displays located inside the museum.Personally I think the museum is well worth the visit. Inside the gift shop is a fine collection of books written about the civil war along with souvenirs.My hat is off to the Missouri Civil War Museum group that was formed in 2002. They managed to raise 1.7 million dollars for the restoration of the building. When you see the before and after pics you will see what an enormous undertaking it was to restore the building. A big thank you to everyone that made this museum possible.The museum is open daily 9 a.m. to 5 p.m. You can find out more at mcwm.org.