Following Friday prayers at his new sectarian monument, the Hagia Sophia mosque, President Recep Tayyip Erdogan announced that Turkey is recommencing drilling surveys in an area of the eastern Mediterranean Sea internationally recognized as belonging to Greece.

Turkey recently suspended plans to conduct the surveys after Germany offered to mediate with Greece. Erdogan now says Greece isn’t living up to its commitments. The critical issue: seeing as the Greek and Turkish armed forces are engaging in increasingly aggressive maneuvers, a conflict cannot be ruled out.