German leIG 18 Infantry Support Gun, WWII (XX0105)

The 7.5 cm leIG 18 — Artillery the Infantry Owned

The leichtes Infanteriegeschütz 18 was not artillery in the usual sense. It belonged to the infantry regiment itself, was crewed by infantrymen, and existed to give a battalion commander something he could order to fire without asking anyone else’s permission.

A gun the infantry could move by hand

Introduced in 1932 and produced throughout the war, the leIG 18 weighed around 400 kg — light enough to be manhandled into position by its crew over ground no vehicle could reach. That was the whole point. Divisional artillery was heavier, more accurate and far more powerful, but it lived kilometres behind the line and answered to its own chain of command.

High angle, short range

The gun could fire at very high elevation, dropping shells behind cover and into trenches, dead ground and reverse slopes that flat-trajectory weapons could not touch. Its range was modest — around 3,500 metres — but it was never intended to reach far. It was intended to reach the machine gun position two hundred metres ahead that was holding up an attack.

Responsiveness over firepower

The value of an infantry gun was measured in minutes, not in shell weight. A request to divisional artillery involved observers, communication and a fire plan; the regimental gun was fifty metres away and its crew could see the target. In the German system this fitted a broader doctrine of pushing decisions down to the lowest level that could take them.

Crew and handling

A five-man crew served the gun, with horse or motor traction to move it between positions and drag ropes for the last stretch. The split-trail carriage and shield are visible in the illustration, along with the low profile that mattered when the gun was firing from within or just behind the infantry line.

Obsolete, and kept anyway

By the later war the concept was being overtaken: mortars did much of the same job more cheaply and were easier to hide, and self-propelled guns did it with protection. The leIG 18 nevertheless stayed in production until 1945, because there was never enough of anything to replace it with — a constraint that describes a great deal of German equipment policy in the second half of the war.