Protestors of the Vietnam war were shot at and 4 were killed by the Ohio National Guard
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The answer is : September 18, 1947.
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The answer is D. The Gupta empire
The North Vietnamese forces, especially the Viet Cong made their own explosives. They used explosives that did not explode, cut them open and made their own improvised explosives. They used traps like bamboo maces or crossbows which were activated by trip wires. One common trap was the punji stake trap. This was a bed of very sharp bamboo stakes hidden in a large hole for their enemies to fall into.
