No. You can find programs that will help you pay for school if
you have Peace Corps experience. Some lenders will forgive some of
your debt for time served but Peace Corps does not make any of
those decisions.
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The pay grade of a Master Sergeant is $46,256 - $65,974 (based
on experience).
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By and large it's a matter of Esprit de Corps. In English, "spirit of the corps/brotherhood/organization of belonging. It is a way to bond in common experience.