For the united states, the lesson learned from the vietnam war was that

pan-africanism or pan-africanism is a political, philosophical, cultural and social movement that promotes african twinning, the defense of the rights of african people and the unity of africa under a single sovereign state, for all africans, both africa as of the african diasporas.

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explanation:

cancer

the answer would be a).

the first two years of american revolution was not very encouraging for the patriots since the british were far superior in sea power, arms and troops.