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It was the immediate trigger for World War I. -
allowing the U.S. to maintain profitable trade with both sides, focus on domestic issues, and avoid "entangling alliances" -
ending Germany's hope for a quick victory in World War I and ushering in four years of trench warfare on the Western Front -
it killed 128 American civilians, angered the U.S. public, and served as a turning point in shifting American opinion against Germany -
symbolizing French national resistance and for its devastating impact on both armies -
temporarily halted unrestricted submarine warfare and appeased the U.S. to prevent its entry into World War I -
one of the costliest battles in history, highlighting the brutal realities of trench warfare, and it led to important tactical and operational lessons that helped the Allies win the war -
it was a secret communication from Germany to Mexico in 1917 that proposed a military alliance against the United States during World War I -
its role in provoking the United States to enter World War I on the side of the Allies -
provided fresh troops and vast resources that turned the tide for the Allied powers, ultimately leading to their victory and the armistice in 1918 -
it created a national system for conscription (the draft) to rapidly expand the military in times of national emergency -
protecting national security by criminalizing the mishandling of classified information and safeguarding military operations and national defense -
were critically important to the Allied victory in France during World War I -
served as the framework for the peace negotiations after World War I and promoted a vision of a just and stable postwar world based on principles like open diplomacy, self-determination, and the creation of the League of Nations -
highlighted the need for global public health systems, leading to the creation of socialized medicine, international health organizations, and revamped national health ministries -
The withdrawal significantly weakened the Allies and reshaped the geopolitical map of Eastern Europe, influencing subsequent conflicts and the development of communist movements worldwide. -
one of the first major tests of the First Amendment's guarantee of freedom of speech and press, its impact on partisan politics, and the debate it sparked about the government's power to limit criticism during times of perceived crisis -
it was the final Allied offensive of World War I, it broke the German army, and it ended the four-year stalemate on the Western Front, paving the way for the Armistice -
it marked the end of World War I fighting on the Western Front at 11 a.m. on November 11, 1918, leading to the signing of the Treaty of Versailles the following year -
redrawing the map of Europe, establishing the League of Nations, and imposing harsh terms on Germany that contributed to future conflict