Transportation corps : railway operating battalion - USA Voorschrift, Field Manual 55-55 Equipment, clothing, and tent pitching - USA Basic Field Manual, FM 21-15 field manual Rules of land warfare / prepared under direction of the judge advocate general field manual Military government / prep. under direction of The Judge Avocate General Service of the piece : 75-mm gun M 2 A 3, truck-drawn and horse-drawn - USA Field Artillery Field Manual, FM 6-56 Aircraft engines - USA Voorschrift, Technical Manual, 1-405 armored division - USA Voorschrift, Field Manual, 17-100 Antiaircraft artillery : service of the piece 105-mm antiaircraft gun - USA Coast Artillery Field Manual, FM 4-130 Service of the piece : 155-mm gun M 1 - USA Field Artillery Field Manual, FM 6-90 Seacoast artillery : service of the piece 10-inch gun : (disappearing carriage) - USA Coast Artillery Field Manual, FM 4-65 Seacoast artillery : service of the piece 3 -inch rapid-fire gun : (barbette carriage) - USA Coast Artillery Field Manual, FM 4-90 Seacoast artillery : service of the piece 155-mm gun - USA Coast Artillery Field Manual, FM 4-25