War bonds are debt securities

Security (finance)

A security is generally a fungible, negotiable financial instrument representing financial value. Securities are broadly categorized into:* debt securities ,* equity securities, e.g., common stocks; and,...

 issued by a government for the purpose of financing military operations during times of war. War bonds generate capital for the government and make civilians feel involved in their national militaries. This system is also useful as a means of controlling inflation

Inflation

In economics, inflation is a rise in the general level of prices of goods and services in an economy over a period of time.When the general price level rises, each unit of currency buys fewer goods and services. Consequently, inflation also reflects an erosion in the purchasing power of money – a...

 in such an overstimulated economy by removing money from circulation until hopefully after the war is concluded.