Possible Clues:

• Big guns, perhaps, spent about eighteen pounds, seventy five pence
• Tired, keeping pressure on arms
• Armaments open war activity at the end of May
• Any power supply does for Arsenal
• Arms in general
• Tired carrying Penny on from clubs, perhaps
• No power to take up in tired arms
• Any power may produce armaments
• Armament
• Any power that's possessed the means to fight