And what makes Isis significant is that they are hugely outnumbered, historians disagree by how much they're outnumbered. Remember, we said Alexander's forces were around 40 or 50,000, while the Persians at Isis, depending on which account you look at, were at least 150,000, probably over 100,000. More ancient accounts talk about many hundreds of thousands, or even a million troops. What also made Isis significant is this is where, this is the first time that Darius III, the Shah-in-Shah, the king of Persia, directly confronts Alexander. Well, Alexander once again is able to, or at least here, is able to overcome unlikely odds and defeat the Persian army, sending Darius into retreat. And he retreats so fast, he even leaves an encampment where his mother, his wife, and his two daughters are there. And Alexander then takes them captive, but treats them very nicely, and then eventually marries one of the daughters.