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Germany, Austria-Hungary, Ottoman Empire, Bulgaria
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1914: Serbia, Russia, France, Belgium, Japan, Montenegro, Great Britain (Australia, New Zealand, Canada, South Africa); 1915: Italy; 1916: Portugal and Romania; 1917: USA, Cuba, Brazil, Panama, Thailand, Liberia, China; 1918: Greece, Guatemala, Nicaragua, Costa Rica, Haiti.
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While visiting Serbia, Archduke Franz Ferdinand of Austria, and his wife Sophie, are assassinated by a Bosnian. Gavrilo Princip was linked to the Serbian terrorist group called the Black Hand, which resented the Austrio-Hungarian empire's treatment of Serbia. The A-H E was determined to keep Serbia from becoming more powerful than it already was.
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Austria-Hungary declares war on Serbia and Russia.
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Russia begins to mobilize armed forces. Austria-Hungary invades Serbia.
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After years of militarism, nationalism, imperialism, and a complicated & faulty alliance system, war breaks out in Europe. This is the start of the Great War. Germany declares war on Russia on the 1st, invades Luxembourg on the 2nd, and declares war on France on the 3rd. By early September the Germans are within 50 miles of Paris, forcing the French government to flee.
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Germany declares war on neutral Belgium and invades in a right flanking move designed to defeat France quickly. This violates a treaty signed by Prussia respecting Belgian neutrality. As a result of this invasion, Britain declares war on Germany and Austria-Hungary. Canada follows suit and joins the war.
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Austria-Hungary invades Russia, opening fighting on the Eastern Front.
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President Woodrow Wilson declares U.S. neutrality.
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The German Army captures Brussels while the Belgian army retreats to Antwerp.
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The British use reconnaissance planes to gain perspective on German troop locations and movements. Airplanes gradually would be used for bombing raids on the front and for "strafing", or firing on, troops from the air. "Dogfights" began because it is easier to shoot down planes from the sky than from the ground. New heroes will emerge, such as Baron Manfred von Richthofen and Eddie Rickenbacker.
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Battle of Tannenberg begins. It ends on 8/30 in total Russian defeat. This becomes Germany's greatest victory of the war inflicting over 250,000 casualties on the Russians.
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The combined efforts of the French and British armies manage to stop the German advance at this battle, as a million and a half soldiers clash. Suffering horrifying casualties, both armies realize they need protection from the ferocious machine-gun fire and heavy artillery. Both sides quickly develope an elaborate trench systems (25,000 miles), which creates a stale-mate and extends the duration of the war. This first major Allied victory saved the French capital.
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First major trench offensive in Belgium near village of Ypres. Germans attack, and the British & French counterattack. After 7 days of fighting 250,000 soldiers are dead.
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Ottoman Empire enters the war on the side of the Central Powers.
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Germany begins to blockade the United Kingdom.
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Allied forces try to break through the Dardanelles Narrows and open a supply route to Russia. The attack's failure, due in part to an unsuspected drifting minefield that sank or disabled five warships, led to the sacking of First Lord of the Admiralty Winston Churchill and 300,000 Allied casualties.
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First use of poison gas by Germans during the Second Battle of Ypres (Belgium). 15,000 men are gassed. French soldiers are completely unprepared, many literally dying where they stand. Others are blinded permanently, while others have breathing difficulties for the rest of their lives.
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In the secret Treaty of London, Italy agrees to switch side in exchange for Austro-Hungarian territory, German African territory, and a large sum of money.
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A British blockade of North Sea leads to unlimited sub warfare by Germany. The Lusitania is sunk killing 1198, including 128 Americans. Wilson resists the call to war.
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German zeppelins bomb London for the first time, causing extensive fires as WW I impacts urban civilian life.
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As part of a major Allied offensive on the Western Front, British forces launch the Third Battle of Artois, during which they use poison gas for the first time.
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Allies retreat from the Gallipoli Peninsula in Turkey, ending a disastrous invasion of the Ottoman Empire that resulted in 252,000 Allied casualties and greatly discredited the Allied military command. 251,000 Turks lost their lives.
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The Germans opened the Battle of Verdun. It lasts until December 18 and results in a French victory. There were 1 million French and German casualties.
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The British fleet fights the German fleet in the Battle of Jutland. It lasts through June 1. The British did lose more ships (14 ships and over 6,000 lives) than the Germans (9 ships and over 2,500 casualties). But the German fleet was never again to be in a position to put to sea and challenge the British Navy in the North Sea.
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The Allies launch the Battle of the Somme. 1.25 million casualties result. The battle lasts until November 18 with nothing won by either side.
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"Big Navy Act" is passes in hopes of avoiding war through military strength. In May, an ultimatum from Wilson secures Germany's promise to stop attacks on merchant vessels without warning.
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The tank first goes into battle at Somme.
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President Wilson was reelected. His campaign's platform included the promise, "he kept us out of the war."
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Reich Foreign Secretary Zimmermann's telegram to Mexico urging her entry into war against the United States is discovered and translated by the British. It said if the U.S. declared war, Germany would offer Mexico an alliance. Germany suggested that Mexico could win back lost territory in Texas, New Mexico, and Arizona.
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Germany announces renewal of unlimited submarine warfare in the Atlantic, warning that submarines will attack all ships, including civiliain passenger carriers, in war-zone waters.
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A German sub torpedoes and sings the American liner Housatonic off the Sicilian coast. The U.S. then cuts diplomatic ties with Germany.
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Czar Nicholas II is forced to give up his throne and a provisional government is formed, headed by Alexander Kerensky. Bolsheviks, led by Vladimir Lenin, later this year overthrow Kerensky, and form a Communist state. Kerensky failed to deal with economic problems and was slow to enact political changes.
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British forces occupy Baghdad, then part of the Ottoman Empire. Baghdad would become the capital of Iraq when the nation was created in 1920. British rule continued until 1932.
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German U-boats torpedo two American ships, the Illinois and the City of Memphis. The U.S. declares war on Germany April 6 and cuts diplomatic relations with Austria-Hungary April 8.
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The United States declares war on Germany, a result of unlimited sub warfare and the Zimmerman telegram. General John Pershing is chosen to command the American Expeditionary Force (AEF) in Europe.
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The U.S. draft board announces that 9.5 million American men have been registered to serve in the armed forces. Men between the ages of 21 and 31 are required to register. 72% of the American men who will fight in the war wil be draftees.
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Nearly 200,000 American troops begin landing in France, led by General John J. Pershing.
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Arab forces led by Englishman T.E. Lawrence ("Lawrence of Arabia") capture the port of Aqaba from the Turks.
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Serbs, Croats, and Slovenes agree to the Pact of Corfu, forming a union called Yugoslavia.
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Disguised Bolshevik leader Vladimir Lenin sneaks into Petrograd to organize an armed takeover of the Russian government.
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German planes bomb the French cities of Dunkirk, Calais, and Belfort.
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Great Britain issues the Balfour Declaration, stating the British intent to establish a Jewish homeland in Palestine. The declaration was included in the British mandate over Palestine, approved by the League of Nations in 1922 over the objection of Arabs.
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After three months of horrific fighting, the Third Battle of Ypres ends when Canadian forces take the village of Passchendaele in Belgium. Nearly 250,000 casualties were suffered by both sides, and the Allies advance five miles. On the same day, behind Bolshevik Party leader Vladimir Lenin, revolutionaries launch the October Revolution, a nearly bloodless coup against Russia's ineffectual Provisional Government. Bolshevik Russia is later renamed the Union of Soviet Socialist Republics.
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President Woodrow Wilson places the nation's railroads under government control.
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President Woodrow Wilson announces his 14 Points as the basis for peace. It included the creation of the League of Nations.
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Russia signs the Treaty of Brest-Litovsk with Germany, ending the fighting on the Eastern Front. The treaty removed Finland, Poland, the Ukraine, and Baltic states from Russian control.
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French and British troops land at Murmansk, along Russia's Arctic shore, in order to support anti-Bolshevik "White" forces in the Russian Civil War.
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Germany launches its last major offensive, the Second Battle of Somme, an all-out drive to win the war before American troops land in Europe.
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The Second Battle of the Somme ends. The Germans advanced almost 40 miles toward Paris, inflicted 200,000 casualties, and captured 70,000 prisoners but suffered nearly as many casualties and exhausted themselves in the process.
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The AEF Second Division would clear the Germans from Belleau Wood by June 25. At this point the Germans coined a name for the Yankee troops -- the Hounds of Hell.
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The port of New York is closed after nine ships off the Atlantic coast are sunk by German U-boats, and German mines are discovered in Delaware Bay.
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A counterattack by the Allies on the Western Front marked the beginning of their final offensive.
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Anarchy reigns in Petrograd, Russia, as Bolsheviks massacre the bourgeoisie and threaten to execute British officials.
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More than 200,000 U.S. troops are aided by 48,000 French. The sky is filled with Allied planes as French, Italian, U.S., Belgian, Portuguese, and Brazilian pilots provide air support. The Germans couldn't match such an impressive lineup. The fighting ended with the Armistice on November 11 after 100,000 German casualties. 26,000 Americans had been killed and 100,000 wounded. It was the largest and costliest battle of the war for the Americans.
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British forces supported by Jewish Brigades begin the last major offensive against the Turks in what would become the state of Israel.
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A bad day for the German effort. Its ally Bulgaria drops out of the war, its Turkish allies sue for peace, and British troops break through the Hindenburg Line and take 22,000 prisoners. General Erich von Ludendorff urges his superiors to negotiate an armistice. Ludendorff resigns Oct. 26.
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British troops break through on the Western Front and pursue swiftly withdrawing German forces.
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During the final Allied offensive, U.S. Army corporal Alvin C. York kills 25 Germans in France's Argonne Forest, captures 132, and saves his small unit from annihilation by a German machine-gun nest.
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The Armistice of Mudros, signed on the island of Lemnos in the Aegean Sea, marks the surrender and dissolution of the Ottoman Empire.
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Germany signs an armistice ending World War I. More than 100,000 American soldiers lost their lives in the war. It would eventually involve 32 nations, destroy four empires, and cost the lives of 17 million people.
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Hungary declares independence from the Austro-Hungarian Empire and is proclaimed a republic.
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From January through June. The treaty changed the map of Europe, making it look like a great jigsaw puzzle, dividing up the old empires, and establishing the League of Nations. Many Germans were opposed to the treaty provision, especially payment of reparations to the Allies for the cost of the war and loss of lands. It was a great source of bitterness in Germany and would later lead to World War II.
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Germany releases all Allied prisoners of war.
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Germany adopts a democratic federal constitution and becomes known as the Weimar Republic. The republic weathers the economic recovery of postwar Germany, but succumbed to Adolf Hitler during the worldwide depression of the early 1930s.
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Austria signs the Treaty of Saint-Germain. It formally marks the end of the Hapsburg monarchy and forbids the union of Austria and Germany.
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In a vote of 49-35, the U.S. Senate fails to ratify the Treaty of Versailles, and with that rejects the League of Nations and other initiatives pushed on Europe by Woodrow Wilson.
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At the Conference of San Remo, called by the former Allies to divide up the former Ottoman Empire, Britain gets the mandate for Palestine. Palestinian Arabs called it the "year of catastrophe."
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In Paris, the Allies set Germany's war reparation payments at 10 billion pounds over 42 years. The payments were reduced by two-thirds the following January.
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Adolf Hitler becomes president of Germany's National Socialist (Nazi) Party.
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Fascist leader Benito Mussolini becomes premier of Italy.
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French and Belgian troops occupy the German industrial region of the Ruhr in accordance with the treaty that ended the war.
