After Alexander died in 323 B.C., his generals (known as the Diadochoi) divided his conquered lands amongst themselves. Soon, those fragments of the Alexandrian empire had become three powerful dynasties: the Seleucids of Syria and Persia, the Ptolemies of Egypt and the Antigonids
The process in which inmates become assimilated to the prison subculture is called Prisonization.
Prisonization is the familiarization of the inmates to the social life in prison community. This represents the negative psychological effects of imprisonment.
Prisonization is the process where the inmates adhere to an informal inmate code ,accepting values supporting criminal behavior to survive in the facility.
Simply, they united because coming together would be the only way to defeat Persia, or else they would lose separately. Hopefully this helped!
Trust worthiness, generosity, truthfulness, straight forwardness