This article examines interstate competitions over “Syrians” whose legal status as Ottoman subjects was not yet terminated by a peace treaty at the end of World War I. Focusing mainly on occupied Istanbul, it traces French efforts to protect or bring Syrians back home to a “Syria.” Given that Syria was still in the making, the stakes here were high and determined postwar reconfigurations that connected Istanbul and Beirut. I argue that competition over Syrians in occupied Istanbul—especially the wealthier and those with military experience—proved critical in the construction of new diplomatic and legal significance accorded to the categories of “Syria” and “Syrian” in the early 20th century. In addition to offering new insights into the dismantling of the Ottoman Empire, the article historicizes projections of imperial influence after World War I and sheds new light on the foundations of French mandate rule in Syria and Lebanon.