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Archduke Franz Ferdinand of Austria and his wife, Sophie, are assassinated by a Bosnian Serb nationalist in Sarajevo.
(https://www.google.es/url?sa=t&rct=j&q=&esrc=s&source=video&cd=&ved=2ahUKEwiPovuGnMDsAhU-BGMBHY-CB3sQuAIwAnoECAUQDA&url=https%3A%2F%2Fkidskonnect.com%2Fhistory%2Fww1-start%2F&usg=AOvVaw0YUY53njEDmioKjR0Nq5Z0) -
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Germany declares war on Russia, France, and Belgium. Britain declares war on Germany. Austria declares war on Russia. Montenegro declares war on Austria. France declares war on Austria. Britain declares war on Austria. Montenegro declares war on Germany. Japan declares war on Germany. Austria declares war on Belgium.
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Britain and France declare war on the Ottoman Empire.
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Landings begin on the Gallipoli Peninsula at Cape Helles and at ANZAC (Australian and New Zealand Army Corps) Cove. The attempt to force the Dardanelles and capture the Ottoman capital at Constantinople (now Istanbul) is a disaster almost from the outset. Altogether, the Allies suffered more than 200,000 casualties during the subsequent nine-month campaign.
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The British ocean liner Lusitania is torpedoed by a German U-boat off the southern coast of Ireland. It sinks in just 18 minutes, and nearly 1,200 people are killed, including 128 U.S. citizens.
(https://www.google.es/url?sa=t&rct=j&q=&esrc=s&source=video&cd=&ved=2ahUKEwis9NDAhrzsAhXFAWMBHXJtDHkQuAIwAHoECAQQDA&url=https%3A%2F%2Fwww.britannica.com%2Ftopic%2FLusitania-British-ship&usg=AOvVaw0jIiPs82tMW2fqFJ7N40Dl) -
The Battle of Verdun begins. Over the next 10 months, the French and German armies at Verdun, France, suffer over 700,000 casualties, including some 300,000 killed. (https://www.google.es/url?sa=t&rct=j&q=&esrc=s&source=video&cd=&ved=2ahUKEwiFzJCQhrzsAhUi5eAKHRqiCD0QuAIwAXoECAEQCg&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DRG3sH5e4ROg&usg=AOvVaw3bul-ieKaIK26WVnk6ZeJK)
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The British offensive is intended to draw German attention from Verdun, and in that regard only could it be considered a success. The nearly 20,000 killed in action on July 1 marks the single bloodiest day in the history of the British army. By the time the Somme campaign ground to a halt some four and a half months later, the combined casualties of both sides topped 1,000,000.
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Tsar Nicholas II abdicates the throne after a week of riots in the Russian capital of St. Petersburg. The Russian Revolution saw the overthrow of the Romanov dynasty and, ultimately, the rise to power of Vladimir Lenin and the Bolsheviks.
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The United States declares war on Germany. In his address to Congress four days earlier, U.S. Pres. Woodrow Wilson had cited Germany’s practice of unrestricted submarine warfare and the “Zimmermann Telegram” as key reasons behind the abandonment of his long-standing policy of neutrality.
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After months of delays, the Soviet government concludes a separate peace with the Central Powers when it accepts the Treaty of Brest-Litovsk. Russia surrenders its claim to Ukraine, to its Polish and Baltic territories, and to Finland.
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Britain and France declared war on Germany. Neville Chamberlain broadcast the announcement that the country was at war.
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Despite the assurances given by Hitler in the Treaty of Munich (Sept 1938), he marched into Czechoslovakia and occupied the country.
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Hitler and Stalin signed a non-aggression pact which included secret clauses for the division of Poland.
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Hitler invaded and occupied Denmark and Norway to safeguard supply routes of Swedish ore and also to establish a Norwegian base from which to break the British naval blockade on Germany.
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Hitler launched his blitzkrieg (lightning war) against Holland and Belgium. Rotterdam was bombed almost to extinction. Both countries were occupied. (https://www.google.es/url?sa=t&rct=j&q=&esrc=s&source=video&cd=&ved=2ahUKEwj3uPzGh7zsAhXcA2MBHYNBB60QuAIwAXoECAIQBw&url=https%3A%2F%2Fwww.iwm.org.uk%2Fhistory%2Fthe-german-lightning-war-strategy-of-the-second-world-war&usg=AOvVaw2jhPIHmP6RG5HKLPx_HGRk)
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Italy entered the war on the side of the Axis powers.
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The French, Marshall Petain, signed an armistice with Germany
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This pact of mutual alliance was signed by Germany, Italy and Japan.
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Hitler sent 3 million soldiers and 3,500 tanks into Russia. The Russians were taken by surprise as they had signed a treaty with Germany in 1939. Stalin immediately signed a mutual assistance treaty with Britain and launched an Eastern front battle that would claim 20 million casualties.
(https://www.google.es/url?sa=t&rct=j&q=&esrc=s&source=video&cd=&ved=2ahUKEwj6laGOh7zsAhVOcBQKHVBYDrIQuAIwAXoECAAQBw&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DgPMgYC0sXos&usg=AOvVaw0B0dPwgbH3vWyeOOtXJrlP) -
The Japanese, who were already waging war against the Chinese, attacked the US pacific fleet at Pearl Harbour, Hawaii, as a preliminary to taking British, French and Dutch colonies in South East Asia. (https://www.google.es/url?sa=t&rct=j&q=&esrc=s&source=video&cd=&ved=2ahUKEwiZ6Iash7zsAhW0BGMBHWE5A80QuAIwAHoECAQQDA&url=https%3A%2F%2Fwww.britannica.com%2Fevent%2FPearl-Harbor-attack&usg=AOvVaw2IMTQ2bHfe-R-f3vujkQ4Z)
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The Russians won their first victory against Germany at the Battle of Stalingrad. (https://www.google.es/url?sa=t&rct=j&q=&esrc=s&source=video&cd=&ved=2ahUKEwj4ncHJhbzsAhXGDWMBHXDGAuQQuAIwAXoECAAQCA&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DgHkELWFqGKQ&usg=AOvVaw2GaIO4rreE311QwrQxWEBK)
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The British and American forces managed to defeat the Axis forces in North Africa.
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The French capital of Paris was liberated from the Germans. (https://www.google.es/url?sa=t&rct=j&q=&esrc=s&source=video&cd=&ved=2ahUKEwi23N-9iLzsAhXB6eAKHRgnBnMQuAIwAXoECAUQBw&url=http%3A%2F%2Forigins.osu.edu%2Fmilestones%2Fthe-liberation-of-paris-wwii&usg=AOvVaw0z15ukhKVfXDH7hqSjJyom)
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German forces in Italy surrendered to the Allies, and Hitler commits suicide.
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The Japanese generals refused to surrender. The US dropped an atomic bomb on the city of Hiroshima and later on the city of Nagasaki.
(https://www.google.es/url?sa=t&rct=j&q=&esrc=s&source=video&cd=&ved=2ahUKEwjN2ueZibzsAhWu3eAKHUv4AoIQuAIwAnoECAkQBQ&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dp5DT6xmL5HA&usg=AOvVaw0opbpiqfVoYR8zPfHY2EHi) -
The Japanese unconditionally surrendered to the allies ending the Second World War.
