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War Department, Office of the Chief of Ordnance

Subject

• Artillery
• Biographies
• CF - Modern fortifications - 20th century
• Decorations
• Edged Weapons
• Electronic warfare
• Firearms and Ammunition
• Fortification in general
• German Propaganda
• Manuals
• MF - Modern fortifications - 19th century
• Military Aviation
• Military History
• Naval Warfare
• OF - Older fortifications
• Regimental and division history - WO I
• Regimental and division history - WO II
• Tanks and vehicles
• Trains
• Uniforms and Equipment
• WO I general
• World War Two