Answer:
The United States mobilized and prepared to fight in World War I by passing a series of laws to raise, equip, and train a massive military force. The first step was the Selective Service Act, which authorized the drafting of millions of men into the military. The government then passed the War Industries Act, which allowed the government to regulate and coordinate the production of war materials. To pay for the war effort, Congress passed the Liberty Loan Act, which authorized the sale of bonds to raise money. An additional tax was imposed on incomes to help fund the war.
To help organize and manage the war effort, President Woodrow Wilson established the War Industries Board, the National War Labor Board, and the War Trade Board. The War Industries Board was responsible for controlling the production of war materials and ensuring that they were distributed to the right places. The National War Labor Board was responsible for settling labor disputes, while the War Trade Board regulated international commerce. Finally, Congress passed the Espionage and Sedition Acts to restrict speech that could harm the war effort.
By the end of 1917, the United States had drafted millions of men into the military, produced vast amounts of war materials, and managed a complex economic and political system in support of the war effort.