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Word War 1 and 2, June 18, 1914, January 30, 1933, World War 2, World War…

- - - - Febrary 18, 1915
        
        April 25, 1915
        
        May 23, 1915
        
        February 21, 1916
        
        July 1, 1916
        
        December 18, 1916
        
        2 more items...
        
        Allied offensive begins the Battle of the Somme.
        
        Germany begins the attack on Verdun.
        
        Italy declares war on Austria-Hungary.
        
        Allied forces land on the Gallipoli Peninsula of the Ottoman Empire.
        
        Germany begins naval blockade of Great Britain.
      - Allied forces halt German advance into France during First Battle of the Marne.
- - - - Late August, 1939
        
        July 10-October 31, 1940
        
        December 7, 1941
        
        8 DEC 1941
        
        18 APR 1942
        
        JUNE 1942
        
        2 more items...
        
        Doolittle Raiders Bomb Japan
        
        Britain and US declare war on Japan
        
        Pearl Harbor
        
        Battle of Britain
        
        Russia and Germany sign pact
      - Britain rearms and reassures Poland