What happened to Alexander's armies on the march home? many of the soldiers decided to settle in persia
thousands of soldiers died from heat in the desert
they fought unexpected battles against persia
the army and the cavalry fought with each other

Thousands of soldiers died from heat in heat

Thousands of soldiers died of heat and thirst in the desert. Alexander's military successes marked the beginning of the Hellenistic Era.

Explanation:

according to my research (britannica and quizlet) the first settlements were along the huang river because it could give the crops more fertile soil that really it out. this was due to the yellow slit caused by floods of the river.