Entitled: "The key to the situation. Are you helping to turn it?" Poster showing a key labeled "Munitions, men, and money." War bonds are debt securities issued by a government to finance military operations and other expenditure in times of war. The bonds also remove money from circulation and thus also help to control inflation. Treasury bills provided the bulk of British government funds in 1916, and were available for terms of 3, 6, 9 and 12 months at an interest rate of 5%. Although these were not formally designated as war bonds, advertising was explicit about their purpose. No artist credited. Parliamentary Recruiting Committee, 1915.