This migration has resulted in "<span>Some states gaining and others losing seats in the House of Representitives, since this number is determined by the population of each state. </span>
I believe that the best answer for this question is a sextant. A sextant is a tool used to navigate the distance between two visible objects. This helped navigators and explorers judge the distance between the sun and the stars, which in turn helped them with location and navigation. Hope this helps.
The war killed an estimate of 2 million Vietnamese civilians
It was called isolationism :D