The modern world is today with language and technology. It began on the 1 AC (After christ) Pre-historic was in the BC (Before christ) was when we didn't have out own place and not all known a language.
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The US thought they could wear down the Vietcong with high casualties but the Vietcong saw the battle as a fight for their lives so they didn't wear down easily. Hope this helps!
Probably B because the sand or once soil was so loose tat the extreme wind was able to pick it up ad whirl it around. so basically it was a case of desertification. Hope this helped
Answer:
it was formed by Warsaw, Poland