The declaration of war by France and the British Empire against the Ottoman Empire in November 1914 was a decisive moment in World War I. This action was predominantly influenced by the Ottomans' entry into the war on the side of the Central Powers, particularly aligning themselves with Germany and Austria-Hungary. The Ottoman Empire, which controlled significant territories in the Middle East, was seen as a threat to British colonial interests in India and the Suez Canal, critical routes for British maritime trade. Consequently, France and Britain aimed to maintain their dominance in the region and disrupt Ottoman military capabilities.

This declaration was preceded by a series of diplomatic tensions, with both France and Britain attempting to secure their interests in the face of a rapidly changing global landscape. The war on the Ottoman front would later involve not only direct military engagements but also significant political maneuvers, such as the McMahon-Hussein Correspondence, aimed at fostering Arab support against the Ottomans. The war's unfolding also saw the rise of nationalist movements within the Ottoman territories, adding a layer of complexity to the conflict.

As the war progressed, the Allies' efforts to dismantle the Ottoman Empire culminated in significant battles such as the Gallipoli Campaign and campaigns in the Middle East, culminating in the partitioning of Ottoman lands. The war’s impacts would resonate for decades, influencing borders, national identities, and geopolitical dynamics in the region that are still echoing today.