World War I ended the wary maneuvering. Allied with Germany, the Ottomans entered the war with arguments drawn from both international systems—the Westphalian and the Islamic. The Sultan accused Russia of violating the empire’s “armed neutrality” by committing an “unjustified attack, contrary to international law,” and pledged to “turn to arms in order to safeguard our lawful interests” (a quintessentially Westphalian casus belli). Simultaneously, the chief Ottoman religious official declared “jihad,” accusing Russia, France, and Britain of “attacks dealt against the Caliphate for the purpose
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