Tuchman starts the "Battle" section by covering the search by Allied naval forces for the German battlecruiser in the Mediterranean (chapter 10). The "Goeben" finally took refuge in the Dardanelles, waters of the then neutral Ottoman Empire. Such naval actions set off diplomatic maneuvers, but the event precipitated Turkey's entry into the war on the side of Germany. The development worked to block Russian import/export via its year-round ports on the Black Sea. That, in turn, led to the disastrous Gallipoli Campaign.