How many grenades were used in World War 1?

During World War I, it is estimated that millions of grenades were used by various armies, although exact figures are difficult to determine. Grenades became a significant part of infantry tactics, with both hand grenades and grenade launchers being employed extensively. The widespread use of grenades was a response to trench warfare, as they were effective for close combat and disrupting enemy positions. Overall, the production and deployment of grenades were a crucial element of the war's brutal combat strategies.