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A-H's Archduke Ferdinand assassinated
Austria-Hungary's Archduke, Francis Ferdinand assassinated while visiting Bosnia -
Austria-Hungary declares war on Serbia
Austria Hungary declares war on Serbia due to the assassination of their archdukde, Francis Ferdinand -
Germany declares war on Russia
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Great Britain declares war on Germany
Great Britain declares war on Germany for violation of Belgium's nuetrality. -
Lusitania sunk by German U-boats
A German U-boat attacks passenger ship with U.S, passengers aboard, helping lead U.S. into the war -
Italy attacks Austria-Hungary and betrays Triple Alliance
Italy betrays Triple Alliance by attacking Austria Hungary -
Czar Nicholas II steps down from Russian throne
Czar Nicholas steps down due to pressure from the duma -
U.S. joins war
U.S. joins war due to continued restricted submarine warfare -
Armistice signed
Armistice signed by Germany to end fighting -
Communists try to seize power in Berlin
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Germany signs Treaty of Versailles
Also creating the League of Nations