 Complete the following phrase:  Furthermore, a sizable portion of Russias ethnic Germans migrated into Russia from its Polish possessions. The 18th-century partitions of Poland 17721795 dismantled the Polish-Lithuanian state, dividing it between Austria, Prussia and Russia. Many Germans already living in those parts of Poland transferred to Russia, dating back to medieval and later migrations. Many Germans in Congress Poland migrated further east into Russia between then and World War I, particularly in the aftermath of the 