Here's the M777 Howitzer US Marines Burned Out While Fighting ISIS
Explainer: What goes on inside a howitzer when a gun barrel is lowered? - TODAY
Heavy artillery of World War II, Soviet howitzer gun ML-20. Caliber 152 mm. Self-propelled artillery mounts. Barrel artillery. 13957924 Stock Photo at Vecteezy
Canada to send C$9 mln of replacement barrels for howitzer guns to Ukraine | Reuters
File:RML 6.3 inch howitzer barrel cross-section.jpeg - Wikimedia Commons