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Mortar (weapon) - Wikipedia
Mortar | History, Types & Uses | Britannica
81mm, 82 mm & 120 mm Medium and Heavy Mortars - GICHD
Famous Military Weapons: Mortars - Warfare History Network
Mortar (weapon) - Simple English Wikipedia, the free encyclopedia
Mortar (masonry) - Wikipedia
Mortars (Infantry-Level) - Military Factory
How A Military Mortar Really Works (And Why Its Been Used
Artillery - Mortars, Barrels, Calibers | Britannica
Mortar (weapon) | Encyclopedia.com