Answer:
This is of course a somewhat subjective question, but most would agree that it is generally not acceptable for the US to engage in unilateral rather than multilateral military action overseas, unless there is a direct threat to the safety of the US, since there is almost always collateral damage in these attacks.
Researching is the best answer
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It usually appears as an individual section called Reference.
It locates at the end of the essay, and they are labeled correspondingly with notice in the previous sections as well.
We can’t answer unless you show us the story