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Cultural shock, Cold War rules of engagement, lack of recognition, Racial divide and social class issues, constant changing of personnel, high casualties, morale issues and a determined enemy.
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Something directly associated to better transport lines: increased settlements in the West
The word that best fills in the gap is "Cabinet"
Cabinet-level federal departments, currently made up of 15 executive departments <span>was established in Article II, Section 2 of the United States Constitution. These departments answer directly to the United States President.</span>