Assuming you're referring to World War I (or World War II for that matter...) you should include in this letter--if you're an American--how you are very much against getting involved in a European conflict, since America was very "isolationist" during this time.
Answer:
The means absolute deviation (MAD) is a measure of variability that indicates the average distance between observations and their mean. MAD uses the original units of the data, which simplifies interpretation.
Explanation:
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Supreme commander of allied forced in the Pacific
supreme commander of NATO forced in Europe.