9. The bloodiest battle of WWI, resulting in the British gaining seven miles of territory and breaking the stalemate of the trench warfare. __ 10. One of the first major battles of WWI __ 11. This event sparked worldwide support for the Allies against Germany. __ 12. This was the first battle that Germany did not readily win and they had to retreat. __ 13. Even though Germany was greatly outnumbered, they were victorious in this battle. __ a. Battle of Tannenberg b. First Battle of the Marne c. sinking of the Lusitania d. Battle of the Somme e. Battle of Tannenberg