The video explains why some World War I helmets had horn-like attachments, focusing on the dangers faced by snipers and lookouts in the trenches. It discusses how these helmet features were designed to protect soldiers from indirect fire. The Stahlhelm was introduced in 1916, replacing the pickelhaube, offering more protection on the battlefield but it wasn't enough. So Germany also introduced the Stirnpanzer in WW1, but was it good enough to defend from the British, Russian's and French during the war?