340 mm artillery

340 mm artillery typically refers to large-caliber artillery pieces that have a bore diameter of 340 millimeters (approximately 13.4 inches). These types of artillery are most often associated with heavy howitzers or coastal defense guns and are used for long-range bombardment, siege warfare, or fortification support. One notable example of 340 mm artillery is the **"340 mm howitzer Model 1939,"** which was used by the Soviet Union during World War II.