The Sumerians/Mesopotamians. They were in modern day Iraq
North was most responsible for "killing" reconstruction.
Answer:Belgrade fell again in October 1915, as the Bulgarians made their way into Niš and Kosovo. All looked lost for the Serbs, so the decision was made to retreat through the mountains of Montenegro and Albania in the hope of making it to Greece, the nearest stronghold of Serbia's allies.
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Answer:
In any case, the Byzantine Empire managed to survive after the decline of the Western Roman Empire due to a number of advantageous circumstances. ... Combined with a lack of mass Germanic migration into their territories, the Eastern Roman Empire was thus in a much better position to survive the collapse of the Empire.
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