Most modern military helmets saw their birth during World War One. The need to address the multitude of head wounds in the trenches was the foundation for the widespread development and deployment of helmets.

This section discusses several of the military helmets of the world.

The helmets from various armies came in a variety of designs. There were a large number of different types developed. In many cases the use of the spilled over into non-military applications such as police and civil defense. most of the helmets during WWI and WWII were constructed of a combination of metal and leather.