The Greeks refused to surrender. They formed themselves immediately into a compact and solid body, fortified themselves as well as they could in their position, and prepared for a desperate defense. There were about ten thousand of them left, and the Persians seem to have considered them too formidable to be attacked. The Persians entered into negotiations with them, offering them certain terms on which they would be allowed to return peaceably into Greece. These negotiations were protracted from day to day for two or three weeks, the Persians treacherously using toward them a friendly tone, and evincing a disposition to treat them in a liberal and generous manner. This threw the Greeks off their guard, and finally the Persians contrived to get Clearchus and the leading Greek generals into their power at a feast, and then they seized and murdered them, or, as they would perhaps term it, _executed_ them as rebels and traitors. When this was reported in the Grecian camp, the whole army was thrown at first into the utmost consternation. They found themselves two thousand miles from home, in the heart of a hostile country, with an enemy nearly a hundred times their own number close upon them, while they themselves were without provisions, without horses, without money; and there were deep rivers, and rugged mountains, and every other possible physical obstacle to be surmounted, before they could reach their own frontiers. If they surrendered to their enemies, a hopeless and most miserable slavery was their inevitable doom. Under these circumstances, Xenophon, according to his own story, called together the surviving officers in the camp, urged them not to despair, and recommended that immediate measures should be taken for commencing a march toward Greece. He proposed that they should elect commanders to take the places of those who had been killed, and that, under their new organization, they should immediately set out on their return. These plans were adopted. He himself was chosen as the commanding general, and under his guidance the whole force was conducted safely through the countless difficulties and dangers which beset their way, though they had to defend themselves, at every step of their progress, from an enemy so vastly more numerous than they, and which was hanging on their flanks and on their rear, and making the most incessant efforts to surround and capture them. This retreat occupied two hundred and fifteen days. It has always been considered as one of the greatest military achievements that has ever been performed. It is called in history the Retreat of the Ten Thousand. Xenophon acquired by it a double immortality. He led the army, and thus attained to a military renown which will never fade; and he afterward wrote a narrative of the exploit, which has given him an equally extended and permanent literary fame.