The siege began in October 1734. On 17 March 1735, Marshal Münnich superseded Peter Lacy, and on 20 May 1735 the long-expected French fleet appeared and disembarked 2,400 men on Westerplatte. A week later, this little army gallantly attempted to force the Russian entrenchments, but was finally compelled to surrender. This was the first time that France and Russia had met as foes in the field. On 30 June 1735, Danzig capitulated unconditionally, after sustaining a siege of 135 days which cost the Russians 8,000 men.