Robert Higgs on government meddling in the economy during WWI

By the time of the armistice, the government had taken over the ocean-shipping, railroad, telephone, and telegraph industries; commandeered hundreds of manufacturing plants; entered into massive enterprises on its own account in such varied departments as shipbuilding, wheat trading, and building construction; undertaken to lend huge sums to business directly or indirectly and to regulate the private issuance of securities; established official priorities for the use of transportation facilities, food, fuel, and many raw materials; fixed the prices of dozens of important commodities; intervened in hundreds of labor disputes; and conscripted millions of men for service in the armed forces.

~ Robert Higgs, Crisis and Leviathan