Howdy, iam Robert Steffen, You have yourself a good one!
Why Are Soldiers Not Given Bulletproof Vests? [Solved]
Well, over time body armour and helmets became less popular ‘cause they were too heavy to move around in. During the two World Wars, no one wore any body armour. But since 20% of all injuries were to the head, they had to come up with some sort of helmet near the end of WW1.