Turkish President Recep Tayyip Erdogan has labelled US President Joe Biden’s recognition of the 1915 Armenian genocide “groundless” and says it has opened a “deep wound” in the two countries’ bilateral relations. Biden broke with decades of US policy on the issue this weekend when he recognised the killing of approximately one million Armenians at the hands of the Ottoman Empire as a genocide. Turkey is a key NATO strategic ally, with the United States military using the country’s Incirlik Air Base as a base for many of its Middle East operations.