The Missouri National Guard Expeditionary Service Ribbon honors Missouri National Guard members who carry out service abroad, in United States military operations or in conjunction with United Nations initiatives for no fewer than fifteen days consecutively or an agglomerate of thirty days.
The Missouri National Guard is composed of the Missouri Army National Guard and the Missouri Air National Guard. The Army component is based in Jefferson City and traces its roots back to Civil War-era militia activity. The Air component, which originated in 1917 and is now based in St. Joseph, is made up of the 131st Bomb Wing and the 139th Air Wing and features the 157th Air Operations Group and the 231st Civil Engineer Squadron as support units.
The ribbon is bisected by a thick vertical red stripe and flanked on either side by four thin white stripes alternating with four thin blue stripes.