During the Cold War period, Germany was divided between East and West, where each of the two sides represented a different system. West Germany was capitalist while East Germany was communist.
The main cause of the division of Germany was the end of the Second World War and the results obtained from that conflict. The initial objective was to share the territory and use it to reheat Europe's economy, which was heavily affected by the costs of the war and its human losses.
The first step in the reunification of East and West Germany was uniting their economies, which had been drastically separated under communist and capitalist blocks.
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