What units are involved?
Army reservists from the 354th MP unit based in North St. Louis. About ten trainers from the 200th MP unit in Ft. Meade, MD, are providing the training.
Info here - http://www.stltoday.com/news/local/crime-and-courts/u-s-army-truck-drivers-in-training-rolling-around-st/article_ccc90fb6-bbf0-11e1-bf92-0019bb30f31a.html