 Complete the following phrase:  Shamil was effective at uniting the many, quarrelsome Caucasian tribes to fight against the Russians, by the force of his charisma, piety and fairness in applying Sharia law. One Russian source commented on him as a man of great tact and a subtle politician. He believed the Russian introduction of alcohol in the area corrupted traditional values. Against the large regular Russian military, Shamil made effective use of irregular and guerrilla tactics. In 1845 an 8-10,000 strong column under the command of Count Michael Vorontsov followed the Imamates forces into the forests of Chechnya. The Imamates forces surround the Russian column, 