Many of the achievements of the ancient indus valley civilization was due to their advanced knowledge of

The civilization of the Indus Valley had a well developed measurement system, using weights and measurement scales. The smallest scale from the Bronze Age period was found in the region; made in ivory, it was marked with  a division of 1.704 milimiters. They used decimal units for measuring weights also. And although the exact measurements for a weight unit (generally 28 grams) varied from region to region, the scale of 5:2:1 was followed when measuring amounts of said units.

supplies had to travel a long distance across water on ships that were often attacked, so they did not reach europe

according to the report, the government has imposed restrictions on freedom of speech, freedom of the press, freedom of assembly, and freedom of association. the official media remained tightly controlled by government censorship and obstruction. restrictions on the freedom to assemble remain a problem in vietnam.

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