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Archduke Franz Ferdinand of Austria, heir to the Austro-Hungarian throne and his wife Sophie, Duchess of Hohenberg were assassinated. this was important to the us because this was the start of the WWI which we were apart of. -
the government of Austria-Hungary declared war on Serbia.
The United States stays politically neutral. -
Great Britain declared war on Germany at 11:00 p.m. for violating Belgian neutrality. The United States declared neutrality at the outbreak of World War I. -
a German U-boat torpedoed and sank the British liner Lusitania off the southern coast of Ireland, killing 1,198 people, including 128 Americans. The incident sparked international outrage and helped spur America's entry into World War I. -
The French failed to capture an important Bulgarian stronghold located at a monastery in the Vardar Macedonia region. -
The British intercept a telegram sent by Alfred Zimmermann in the German Foreign Office to the German embassies in Washington, D.C., and Mexico City. it message outlines plans for an alliance between Germany and Mexico against the United States. -
the United States formally declared war against Germany and entered the conflict in Europe. President Woodrow Wilson strove to maintain American neutrality. Anti-war sentiment ran across the political spectrum. -
Shock troops with the Austro-Hungarian Army pushed 11 Italian divisions off the Mount Ortigara summit, regaining their important defensive position in Asiago, Italy. -
after more than four years of horrific fighting and the loss of millions of lives, the guns on the Western Front fell silent. Although fighting continued elsewhere, the armistice between Germany and the Allies was the first step to ending World War I. -
the Treaty of Versailles was signed at the Palace of Versailles outside Paris, France. The treaty was one of several that officially ended five years of conflict known as the Great War—World War I.