The grenade of military use has been sporadic and the technology relative basic. The British army started the war with only a few basic grenades. Many British soldiers resorted to making homemade bombs, filling jam tins with a scrap metal and explosive.
SUBMARINE WARFARE
Submarine Warfare was first introduced in World War I in early 1915.
TANK WWI
Along with the tank, the first self-propelled gun (the British Gun Carrier Mk I) and the first armored personnel carrier (the British Mk IX) were constructed in World War I.
These are the combat helmets of the WWI, it was an iconic symbol of war.
GERMAN COMBAT HELMETS
BATTLEFIELD RELICS
This was an important piece of ground on which a battle is or was fought and it was used during WWI.