The importance of Turkish food has been also evident in the structure of the Ottoman military elite, the Janissaries. The commanders of the main divisions were known as the Soupmen, other high ranking officers were the(Turkish Food) Chief Cook, Scullion, Baker, and Pancake Maker, though their function had little to do with these titles. The huge cauldron used to make pilaf had a special symbolic significance for the Janissaries, as the central focus of each division. The kitchen(Turkish Food) was also the centre of politics, for whenever the Janissaries demanded a change in the Sultan's Cabinet, or the head of a grand vizier, they would overturn their pilaf cauldron. "Overturning the cauldron," is an expression still used today to indicate a rebellion in the ranks. It was in this environment that hundreds of the Sultans' chefs, who dedicated their lives to their profession, developed and perfected the dishes of the Turkish Cusine (Turkish Food), which was then adopted by the kitchens of the provinces ranging from the Balkans to Southern Russia, reaching Northern Africa. Istanbul was the capital of the world and had all the prestige, so that its ways were imitated. At the same time, it was supported by an enormous organization and infrastructure which enabled all the treasures of the world to flow into it. The provinces of the vast Empire were integrated by a system of trade routes with refreshing caravanserais for the weary merchants and security forces. The Spice Road, the most important factor in culinary history, was under the full control of the Sultan. Only the best ingredients were allowed to be traded under the strict standards established by the courts.