Battle of Thermopylae all Greek soldiers in the second Persian invasion. It is sometimes stated that Thermopylae was a Pyrrhic victory for the Persians (i.e., one in which the victor is as damaged by the battle as the defeated party). However, there is no suggestion by Herodotus that the effect on the Persian forces was that. The idea ignores the fact that the Persians would, in the aftermath of Thermopylae, conquer the majority of Greece, and the fact that they were still fighting in Greece a year later. Alternatively, the argument is sometimes advanced that the last stand at Thermopylae was a successful
Thermopylae shoreline has also advanced over the centuries because of the sedimentary deposition. The level of the Malian Gulf was also significantly higher during prehistoric times and the Spercheios River was significantly shorter. Its shoreline advanced by up to 2 kilometers between 2500 BC and 480 BC but still has left several extremely narrow passages between the sea and the mountains. The narrowest point on the plain, where the Battle of Thermopylae was probably fought, would have been less than wide. Between 480 BC and the 21st century, the shoreline advanced by as much as in places, eliminating the narrowest points