(M585) Ariæus, who commanded the Asiatic forces on the left wing of the army at the battle of Cunaxa, joined the Greeks with what force remained, in retreat, and promised to guide them to the Asiatic coast, not by the route which Cyrus had taken, for this was now impracticable, but by a longer one, up the course of the Tigris, through Armenia, to the Euxine Sea. The Greeks had marched ninety days from Sardis, about fourteen hundred and sixty-four English miles, and rested ninety-six days in various places. Six months had been spent on the expedition, and it would take more than that time to return, considering the new difficulties which it was necessary to surmount. The condition of the Greeks, to all appearance, was hopeless. How were they to ford rivers and cross mountains, with a hostile cavalry in their rear, without supplies, without a knowledge of roads, without trustworthy guides, through hostile territories? (M586) The Persians still continued their negotiations, regarding the advance or retreat of the Greeks alike impossible, and curious to learn what motives had brought them so far from home. They replied that they had been deceived, that they had no hostility to the Persian king, that they had been ashamed to desert Cyrus in the midst of danger, and that they now desired only to return home peaceably, but were prepared to repel hostilities. (M587) It was not pleasant to the Persian monarch to have thirteen thousand Grecian veterans, whose prestige was immense, and whose power was really formidable, in the heart of the kingdom. It was not easy to conquer such brave men, reduced to desperation, without immense losses and probable humiliation. So the Persians dissembled. It was their object to get the Greeks out of Babylonia, where they could easily intrench and support themselves, and then attack them at a disadvantage. So Tissaphernes agreed to conduct them home by a different route. They acceded to his proposal, and he led them to the banks of the Tigris, and advanced on its left bank, north to the Great Zab River, about two hundred miles from Babylon. The Persians marched in advance, and the Greeks about three miles in the rear. At the Great Zab they halted three days, and then Tissaphernes enticed the Greek generals to his tent, ostensibly to feast them and renew negotiations. There they were seized, sent prisoners to the Persian court, and treacherously murdered.