Before Elvis wore them, sideburns marked soldiers on the battlefield

https://www.dictionaryscoop.com/article/Before-Elvis-wore-them-sideburns-marked-soldiers-on-the-battlefield Health breakthroughs (like modern trauma care) and everyday tech (like the microwave oven) came straight out of wartime research labs. But there's a quieter legacy nobody talks about: language. Military vocabulary quietly slipped into ordinary conversation. Take the trench coat, invented for officers freezing in WWI trenches, now just a stylish coat you grab on a rainy day. Or SNAFU, once army slang for total chaos, is now what you call it when your printer jams for the third time. Here are 10 examples you've probably used without realizing where they came from.