What did Alexander the great do with the people he conquered?
I believe he did the same as the Roman conquerors–the conquered people were assimilated into their society. Shortly, Persian people were marrying Greeks, etc. Alexander’s armies left trusted politicians and army leaders, army units, and of course the families of the soldiers who trailed along with them to the place recently conquered. While I am sure many people were killed, maimed, and/or injured by the Persian armies, the surviving people tried to learn the Persian language and societal rules, if they wanted to get anywhere in Persian courts and high circles.