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It triggered a series of ultimatums and declarations of wars that activated the European system of alliances. -
It allowed the country to avoid conflicts destruction, maintain profitable trade with both sides, and grow its economy. -
It was critical because it halted Germany's advance into France, saved Paris, and ended their hope for a quick victory in WW1 -
It significantly turned American public opinion against Germany, shifted the narrative of the war, and hastened the United States eventual entry into World War I -
For its high casualties, which led to the battle becoming a powerful symbol of French national sacrifice and resistance, and for its strategic impact, which halted a major German offensive and influenced military tactics. -
It was a promise from Germany to the U.S. in May 1916 to limit its submarine warfare during World War I. -
It lies in its high casualty rate, which made it a symbol of the futility of trench warfare, and its long-term impact on military tactics and strategy. -
It was a secret message from Germany proposing a military alliance with Mexico against the United States during World War I. -
It was a strategy to cripple the Allies by starving Britain, but it ultimately backfired by provoking the United States' entry into World War I, which sealed Germany's defeat. -
Its role as a turning point in the war, which ultimately ensured the Allied victory by providing a flood of new troops, supplies, and financial credit to the weary Allied forces. -
It created a mandatory military draft system in the U.S., allowing the federal government to conscript citizens for military service. -
It created a mandatory military draft system in the U.S., allowing the federal government to conscript citizens for military service. -
It provided fresh troops and resources that tipped the balance in favor of the Allies, helping them win key battles like the Meuse-Argonne Offensive and ultimately leading to the end of World War I. -
It was to provide a blueprint for a just and lasting peace at the end of World War I, aiming to create a new international order based on cooperation and democracy. -
It killed an estimated 50 million people globally, more than World War I, and infected one-third of the world's population. -
It allowed Germany to focus its forces on the Western Front, which briefly increased the possibility of a German victory. -
It was a direct challenge to the First Amendment's guarantee of freedom of speech and the press, leading to the first major national debate over the meaning of these rights. -
It was the largest American offensive of World War I, ultimately helping to break German lines and hasten the end of the war. -
It marked the end of major fighting in World War I on the Western Front and set the stage for the eventual peace treaties. -
They officially ended World War I, leading to major geopolitical changes and the creation of new international bodies.