Infantry guns — direct-fire artillery for close infantry support

Typical characteristics

These weapons commonly combine modest caliber, relatively low muzzle velocity and simplified carriages so they can be moved with infantry. Features often include a light split-trail or single-axle carriage, small-diameter wheels or skids for dragging, a shield for crew protection and sights optimized for direct fire. They fire a variety of ammunition types and are optimized for high-explosive effects at close ranges.

• Mobility: manhandled short distances, towed by light vehicles or horses in earlier eras.
• Ammunition: high-explosive, shrapnel, smoke and sometimes fragmentation or hollow-charge rounds; see shells for types used in direct support.
• Fire mode: direct line-of-sight aiming rather than high-angle indirect fire used by mortars.

History and development

Infantry guns emerged in the late 19th and early 20th centuries as armies sought artillery that could operate with infantry units rather than from rear positions. They were widely used in World War I and World War II to suppress enemy strongpoints and accompany assaults. After World War II many roles formerly filled by infantry guns were taken over by more versatile weapons such as recoilless rifles, automatic grenade launchers and light mortars, while armoured vehicles and assault guns provided mobile direct-fire support.

Uses and notable distinctions

Infantry guns were valued for knocking out emplacements, creating shooting lanes and delivering immediate firepower in urban and broken terrain. They differ from mortars by delivering flatter-trajectory, direct-fire shots, and from field guns by their lighter weight and closer tactical integration with foot troops. They are also distinct from vehicle-mounted tank or assault guns, which use heavier guns but rely on mobility and armour rather than dismounted employment.

Modern infantry formations often rely on a mix of portable direct-fire weapons and indirect systems; the historic infantry gun remains an important concept for understanding how armies balance firepower, mobility and protection to support close combat. For further context on infantry organization see infantry forces.