Alexander the great's empire was divided following his death. what three powerful dynasties developed from this division? describe the three threats that each dynasty faced and that resulted in constant warfare.

The three powerful dynasties that developed after Alexander the Great's death were. Ptolemy dynasty, Seleucus dynasty and  Antigonid dynasty. For Ptolemy dynasty, they were absorbed with the Roman Empire and because their rulers were not effective, they were under control by the Romans in Egypt. For the Seleucus dynasty, they lost control over the Asia Minor against the Roman Empire and was abolished by Pompey the Great. Antigonid dynasty lost their war against the Romans because of the three "fetters" of Greece through three wars.

Ghana, first of the great medieval trading empires of western africa (fl. 7th–13th century). it was situated between the sahara and the headwaters of the sénégal and niger rivers, in an area that now comprises southeastern mauritania and part of mali.