This a large placard for "334th M.P.E.G. Co. Best Barracks". Wooden shield measures 14 1/4" x 18", with hand-lettering and crossed pistols. What looks like a glued repair is actually just a flaw in the wood which leaked sap over time.

The 334th Military Police Escort Guard Company was formed July 21st, 1942 and was renamed 334th Military Police Company on March 13th, 1953, so that dates it to WW2/Korean War.