 Complete the following phrase:  With the collapse of the Soviet Union, Ukraine was reestablished as an independent state in 1991, and most of the peninsula was reorganized as the Autonomous Republic of Crimea, and the city of Sevastopol retained its special status within Ukraine. The 1997 Partition Treaty on the Status and Conditions of the Black Sea Fleet partitioned the former Soviet Black Sea Fleet and allowed Russia to continue basing its fleet in Crimea: both the Ukrainian Naval Forces and Russias Black Sea Fleet were to be headquartered in Sevastopol. Ukraine extended Russias lease of the naval facilities under the 2010 