North Vietnam (aka communist Vietnam) gaining control of the government, and caused American troops to leave Vietnam
Flooding and silt should be the answer
The main reason why Congress passed the Indian Removal Act in 1830 was "<span>b. to move eastern Indian tribes to lands west of the Mississippi," since the goal was to clear this land for white settlement. </span>
<span>the colonial governments had power to pass laws and create taxes. they also decided how the colony's tax money should be spent. they also elected their own assemblies.
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