The Allies, at this juncture, found themselves placed in a strange predicament. Their plans had hitherto been successful, and nothing remained to be done except to justify their first resolutions by standing firm to their original purpose. The critical moment at length arrived, and then, in the very presence of the enemy, they changed their minds. They would not operate against the north of Sevastopol; they would attack it from the south, and form a secure base in the harbours of Balaklava and Kamiesh, that indent the coast of the upland plain, called by the ancients the Chersonese. In order to accomplish this new design, they had to march the united armies from the Belbek to the south-west corner of the peninsula, quite close to the fortress they intended to capture. Added to this, the ground over which they had to pass was unknown; they left behind them the broad, open, and treeless plains, where they could march in battle array, ready for emergencies; they now approached a woody, difficult, and intersected country, and had to adopt long columns of route in moving across it. According to the information in their possession, moreover, a hostile army was sheltered somewhere within the lines of Sevastopol; it was believed to be securely posted behind the entrenchments on the northern plateau. They did not wish to meet it there, and, to avoid doing so, they were obliged to have recourse to the only alternative, and to commit a bad military error. They exposed the right of their long columns and their rear to imminent danger, and, courting disaster, invited the Russians to fall upon them, in a position where partial defeat must prove fatal to their existence.