U.S. World War I, also called First World War or Great War, an international conflict that in 1914–18 embroiled most of the nations of Europe along with Russia, the United States, the Middle East, and other regions. WASHINGTON -- War!That was the headline screaming from newspapers around the country on April 6, 1917, as the United States declared war on the German empire.The United States … Europe was extremely chaotic, new governments had been established, half of the nation had been ruined by war and needed rebuilding, and economies destroyed. In the long term, World War I was a net positive for the American economy. Immediately after the war erupted in Europe in 1914, though their country remained neutral, Americans became involved in the war effort both individually and through organizations. The war drastically changed the world, thrusting the United States onto the global stage and exposing millions of Americans to foreign lands and modern warfare. The home front of the United States in World War I saw a systematic mobilization of the entire population and the entire economy to produce the soldiers, food supplies, munitions and money needed to win the war. Within a few months, thousands of U.S. men were being drafted into the military and sent to intensive training. The United States enters the war. Over 4.7 million men and women served in the regular U.S. forces, national guard units, and draft units with about 2.8 million serving overseas. Many of the Americans who opposed United States entry into World War I based their opposition on a tradition established by. George Washington's Farewell Address. The results of World War 1 definitely contributed to the cause of The Great Depression in the United States in 1929. The United States declared war on Germany on April 6, 1917. The Zimmermann Telegram was a diplomatic note sent by the German Foreign Office to Mexico in January 1917 which proposed a military alliance between the two nations should the United States enter World War I (1914-1918) on the side of the Allies. No longer was the United States a nation on the periphery of the world stage; it was a cash-rich nation that could transition from a debtor to a global creditor.America had proved it could fight the war of production and finance and field a modern volunteer military force. Believed that its right as neautral nation had been violated. Prompts About the United States in World War I: Essay Prompt 1: Write an essay of at least three to four paragraphs that explains why the United States desired to stay neutral during World War I. Entry into World War I, 1917 On April 2, 1917, President Woodrow Wilson went before a joint session of Congress to request a declaration of war against Germany. The United States entered World War I mainly because the United States. The United States entered World War I in April 1917. The weakened condition of the Allied forces in the spring of 1917 made it clear that the United States would have to provide more troops than perhaps originally anticipated. There were 53,402 killed in action, 63,114 deaths from disease and other causes, and about 205,000 wounded.