On January 25, 1648, Khmelnytsky brought a contingent of 400–500 Cossacks to the Zaporizhian Sich and quickly killed the guards assigned by the Commonwealth to protect the entrance. Once at the Sich, his oratory and diplomatic skills struck a nerve with oppressed Ruthenians. As his men repelled an attempt by Commonwealth forces to retake the Sich, more recruits joined his cause. The Cossack Rada elected him Hetman by the end of the month. Khmelnytsky threw most of his resources into recruiting more fighters. He sent emissaries to Crimea, enjoining the Tatars to join him in a potential assault against their shared enemy, the Commonwealth.