page_title: 12"/40 caliber gun
hierarchical_section_title: 12"/40 caliber gun
context_page_description: The 12"/40 caliber gun were used for the primary batteries of the United States Navy's last class of monitors and the Maine-class and Virginia-class pre-dreadnought battleships.
context_section_description: The 12"/40 caliber gun (spoken as "twelve-inch-forty--caliber") were used for the primary batteries of the United States Navy's last class of monitors and the Maine-class and Virginia-class pre-dreadnought battleships.
caption: View of Ohio and her forward 12"/40 caliber guns in the Mark 4 turret in 1916.
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