 Complete the following phrase:  The isolation of the region was increased further by the Treaty of Constantinople in 1700, which provided that there should be no settlements or fortifications on the coast of the Azov Sea to the mouth of the Mius River. Moreover, in 1709, in response to a Cossack alliance with Sweden against Russia, Tsar Peter the Great ordered the destruction of the Zaporozhian central stockade, called the Sich, and their complete expulsion from the area, without allowance for their return. In 1733, however, Russia was preparing for a 