During World War II the B&O purchased its last class of steam locomotives, the EM-1 2-8-8-4 simple articulated. Though the railroad desired to purchase diesels, wartime restrictions dictated this final order for big steam. EM-1s moved plenty of war traffic and then served for ten more years hauling fast freights, coal trains and, occasionally, passenger runs over the B&O's heaviest grades. Softbound, 71 Pages, 8-1/2 x 11" Format