Xenophon Anabasis 3.1.2

[2]
  After the generals had been seized and such of the captains and soldiers as accompanied them had been killed, the Greeks were naturally in great perplexity, reflecting that they were at the King’s gates, that round about them on every side were many hostile tribes and cities, that no one would provide them a market any longer, that they were distant from Greece not less than ten thousand stadia, that they had no guide to show them the way, that they were cut off by impassable rivers which flowed across the homeward route, that the barbarians who had made the upward march with Cyrus had also betrayed them, and that they were left alone, without even a single horseman to support them, so that it was quite clear that if they should be victorious, they could not kill anyone, ¹ while if they should be defeated, not one of them would be left alive.