This article talk about how The 1915 French “Adrian” helmet provided the most protection, researchers found, even more than that of modern helmets. www.pbs.org/newshour/sci...

How a WWI war helmet outperformed modern gear in a new study

Your great-grandfather’s World War I helmet that’s stuffed in the back of the closet could be just as effective at preventing brain injury from some blasts as a modern-day military helmet, a recently ...

Oh that's interesting! Just saved this to read later, thank you!