WHEN was body armor made?

Body armor is pre-historic. When man learned that several layers of hide would keep an enemy spear from causing injury the idea of armor evolved. When copper and bronze weapons started being able to defeat hide armor, boiled leather and metal composites were invented, then ring, and finally plate.

When guns became the common weapon of the soldier, armor became ceremonial and eventually disappeared until WWII when the aviators in bombers asked for something to shield them from flak and modern body armor was born.