The War Industries Board (WIB) was a U.S. government agency established during World War I to coordinate the production of war materials and supplies for the military. Its main purpose was to ensure that the armed forces were well-equipped by managing the allocation of resources, setting production priorities, and maximizing efficiency in manufacturing. The WIB played a crucial role in mobilizing American industry to support the war effort and was instrumental in transforming the U.S. economy during this time.