The Gallipoli Campaign was almost a year long campaign that started on February 19, 1915, and ended on January 9, 1916. The campaign was a British invasion of the Ottoman Empire to gain control of the Marmara Sea. This invasion was not successful, and the allies evacuated on December 7, 1915 and ended January 9, 1916. This campaign cost over half a million casualties, including almost 111,000 deaths in total.
Battle of Verdun
The battle of Verdun was an 11 month battle that was fought between the French and the German Empire in Verdun, France. The Battle was a German offensive to invade France, this failed, however because the France's allies started up another offensive to distract the Germans so the French could win. In the end, the French did win, but at a whooping 700,000 total casualties. Even today skeletons of the soldiers of Verdun are still being uncovered.