For John, BLUF: Dark Chocolate helps you sleep, I am told. Nothing to see here; just move along.
"Combat candy: As M&Ms turn 75, a look at sweets in service". This is an article by Mr Kevin Lilley, of The Army Times.
U.S. military-issued chocolate pre-dates the modern-day MRE, and even the C-ration. With one of the service’s key suppliers celebrating a milestone this year, here’s a look at some sweet history.And, thus flows the history.
One of the interesting parts to me is that M&M comes from a partnership of Mr Forest Mars Sr. (think Mars Bars (and Uncle Ben's Converted Rice)) and Mr William F. R. Murrie, formerly president of Hershey. For World War II M&Ms had but a single customer — the U.S. military.
Regards — Cliff
Wikipedia says it was the son of Mr William Murrie, Mr Bruce Murrie.