When Charles left Switzerland for the Netherlands, the allies were left with a smaller army under Korsakov, who was ordered to unite with Suvorov's army from Italy. Masséna attacked Korsakov, crushing him at the Second Battle of Zurich. Suvorov with a force of 18,000 Russian regulars and 5,000 Cossacks, exhausted and short of provisions, led a strategic withdrawal from the Alps while fighting off the French. Allied failures, as well as British insistence on searching shipping in the Baltic Sea led to Russia withdrawing from the Second Coalition. Emperor Paul recalled the Russian armies from Europe.