2. How many troops by May 1966?

5,000 U.S. troops

Explanation:

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More than 5,000

Explanation:

More than 5,000 U.S. troops, backed by huge numbers of helicopters and armored vehicles, sweep the area around north of Saigon.

Hope this helps, please let me know if I'm wrong.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.