Having received word of the danger to Berlin, Prince Eugene of Württemberg led his troops back from fighting the Swedes in Pomerania while a contingent from Saxony also arrived, boosting the defenders to around 18,000.[7] The arrival of Lacy's Austrians, however, swung the balance in favour of the Allies. The Austrians occupied Potsdam and Charlottenburg and in the face of these superior forces the Prussian defenders were forced to abandon the city and retreat to nearby Spandau.