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Grenade - Wikipedia
Grenade | Military Weaponry & History | Britannica
United States hand grenades - Wikipedia
Grenades | National WWI Museum and Memorial
en.wikipedia.org
The Modern Grenade: A Brief History - Warfare History Network
How Grenades Work | HowStuffWorks
The History of the Hand Grenade - ThoughtCo
Time-Delay Grenade - How Grenades Work | HowStuffWorks
Fast Facts - History of the Hand Grenade - WAR HISTORY ONLINE