"Title:" Your opportunity - Army ordnance schools "Abstract:" Poster showing six scenes of Army ordnance education. "Physical description:" 1 photomechanical print (poster) ; 65 x 48 cm. "Notes:" A.G.O. No. 202 - July 21, 1919.; Poster captions: A big railway gun ; A tractor-mounted howitzer ; Class in gasoline engines ; Machine gun instruction ; Operating a big tractor ; Sighting an anti-aircraft gun.; Ordnance Recruiting Poster No. 4.