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Warfare between city-states, overpopulation, and drought caused it .
Sumerian traders traveled <u>2000 miles </u>to the Indus River in India to trade with civilizations there.
<u>Explanation:</u>
Sumerians are known for their metalwork and craft. Sumerians traded with their neighboring countries for their survival. They exchanged timber, wine, precious metals and stones to get grain, oils and textiles.
To trade with Indian civilizations, Sumerian traders traveled 2000 miles to the Indus River. They use donkey caravan, river barges and sea- going ships for travelling to all parts of the world.
During trading Sumerians faced many challenges. They mainly used sea route for trading; Unpredictable flooding was a great challenge faced by the Sumerians.
Answer: Sudetenland; Czechoslovakia
The Sudetenland is a historical area of former Czechoslovakia which was inhabited by Sudeten Germans. After WWI, Austria-Hungary was dismembered and the Sudeten Germans found themselves in the new country of Czechoslovakia.
With the rise of Pan-Germanism before and during WWII, Germany claimed the Sudetenland, and annexated it after the Munich Agreement. After the war, Czechoslovakia expelled the Sudeten Germans from their territory, and the area is now almost exclusively inhabited by Czech speakers.