Gear gets defined by scientific testing and research.  And this process was pioneered with the development of the field jacket. 

Almost all clothes have something to do with the military. But one industry in particular has a lot to do with the military.  The first episode of the new season establishes how the American military came to be, and how they were dressed. To see images and learn more, go to articlesofinterest.substack.com

The next series from Articles of Interest

How uniforms shaped the American school system. Images and a very special animation at articlesofinterest.substack.com