Field Artillery : Tactical Employment - USA Field Manual, FM 6-20 Educational Training : General Principles, 1920 / General Staff, War Office Educational Training / General Staff, War Office Finance department : general provisions - United States War Department, Army Regulations 35-5 Thompson submachine gun caliber .45, M1928A1 - USA Basic Field Manual, FM 23-40 Warfare in undeveloped countries Warfare in undeveloped countries : Desert warfare - Engeland Voorschrift, 26/GS Trg Publications/1784 land battle : Tactics - Engeland Voorschrift, 26/GS Trg Publications/2482 land battle Enemy equipment Infantry Training : Tactics : The infantry battalion in battle - Engeland Voorschrift, 26/GS Trg Publications/1977 musketry regulations / War Office