rtokens: President Boris Yeltsin ordered Lebed to restore peace in Chechnya and gave him unspecified sweeping powers to carry out the mission .
pos: CC NNP VBD TO VB NN IN DT NN IN NNP CC PRP$ NNS VBD JJ JJ VBZ .
tokens: But Russia failed to win control over the whole of Chechnya and its troops suffered several humiliating defeats .
ltokens: Tens of thousands of people have died in the war , begun in late 1994 after Moscow sent troops to quell Chechnya 's independence bid .