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Why is Eastern Germany lesser
developed then Western Germany or
even Western Europe?

The poverty of East Germany induced by reparations provoked the Republikflucht ("desertion from the republic") to West Germany, further weakening the GDR's economy. Western economic opportunities induced a brain drain.

Explanation:

The poverty of East Germany induced by reparations provoked the Republikflucht ("desertion from the republic") to West Germany, further weakening the GDR's economy. Western economic opportunities induced a brain drain.

the roman republic began to expand when rome fought the punic wars and defeated carthage. the punic wars refer to the series of 3 wars fought among rome and carthage, before it ended in carthage's defeat.