The conflict that arose over the control of the Dardanelles in 1915 was known as the Gallipoli Campaign, a significant military operation during World War I. Allied forces, primarily British and ANZAC troops, aimed to secure the Dardanelles Strait to open a sea route to Russia and knock the Ottoman Empire out of the war. The campaign began in April 1915 but quickly turned into a costly stalemate, characterized by fierce combat and harsh conditions for troops. Ultimately, the Allies were unable to capture the strategic positions, leading to their withdrawal in January 1916, marking a significant defeat and a boost for Ottoman morale.