When did alexander die, and how far did his empire extend at the time of his death?

acctually alexandar the great's empire started to fall, and divded among many peices after his death in 323 bc

explanation:

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.