The debates in the allied fleet came to an end with the appearance of the Persians. The shrewd plan of Themistocles had succeeded. The Greeks would have to fight with their backs to the wall, but they would fight with better chance of success than under any other circumstances. The Greek force consisted of about 380 vessels. Of these, Athens contributed 180, Sparta and the rest of the Peloponnesus were represented by 89 and the remainder were made up of squadrons from the island states. Some of these island contingents contained a type of ship different from the triremes, the penteconter. This was a galley with only one bank of oars, but these were long sweeps, each manned by five oarsmen. The penteconter was an early prototype of the galley of the Christian era. The Persians had been reduced by this time to about 600 ships, although there had been numerous reenforcements since the disaster at Cape Sepias. The fleet was "Persian" only in name, for, except for bands of Persian archers on some of the ships, it was composed of elements levied from each of the subject nations that followed the sea. Indeed Persia is a curious example in history of a nation with a purely artificial sea power, for its navy was composed of aliens entirely. Thus the squadron that was sent to blockade the western end of the straits was Egyptian, the right wing of the fleet as it advanced to the attack was composed of Phoenicians, and the center and left was made up of Cyprians, Cilicians, Samothracians, and Ionians, the latter only recently in rebellion against Persia and at that time welcoming help from Athens in a cause in which Athens herself was now involved. Apparently there was no compunction felt on this account, for the Ionians distinguished themselves by gallant fighting against their Greek brethren. Nevertheless, it is not hard to imagine difficulties involved in the task of making a unit of such an assortment of peoples. The fleet was commanded by a Persian, Prince Ariabignes, brother of Xerxes. At daybreak the Persian triremes drew up in three lines on each side of the island of Psyttaleia and advanced into the straits. But the narrowing waters of the channel made it necessary to reduce the front and bear to the left. Consequently all formation was lost, and the Persian triremes poured into the narrows "in a stream,"--to quote the phrase of the tragedian AEschylus, who fought on an Athenian trireme in this battle and describes it in one of his plays.