As the result of a realignment of European powers, Russia
sided with France, Austria, Sweden, and Saxony to offset the
growing
influence and expansion of Prussia under the leadership of
Frederick the Great, allied with Great Britain and Hanover.
In 1756, the
allies declared war on Prussia. Close to 300,000 Russian soldiers
fought in the conflict, scoring impressive victories against
the Prussians—even holding Berlin for a time. Prussia was
about to collapse when Empress Elizabeth (r. 1741–61) suddenly
died, and the crown went to her nephew, Peter III (r. 1761–62),
who was an ardent admirer of the great Frederick. The new emperor
pulled Russia out of the war, sparing the Prussian king and
his realm.