Includes four 15cm sFH18 guns (optional s10cm K18 barrels) with crew, one Command SMG team, one Staff team, two Observer Rifle teams, one Motorcycle and sidecar, four Large bases, one Medium base & three Small bases.

The 15cm schwere Feldhaubitze 18 or sFH18 (German: “heavy field howitzer, model 18”), nicknamed Immergrün (“Evergreen”), was produced by Rheinmetall and Krupp companies and adopted by the German army in 1935. It was the first artillery weapon equipped with rocket-assisted ammunition to increase range. The 15cm sFH18 was also used in the self-propelled mounting of the Hummel.

By the outbreak of war the Wehrmacht had about 1,353 of these guns in service. Production continued throughout the war, reaching a peak of 2,295 guns in 1944. A total of 5,403 sFH 18 howitzers were produced. One of the four battalions in each artillery regiment in infantry divisions was equipped with these howitzers.

Numerous experiments were carried out on the 15cm sFH18 to improve its range. These led to the 15 cm sFH18M version with a removable barrel liner and a muzzle brake that allowed a larger “special 7” or 8 charge to be used. The 18M increased range to 15,100 m, but it was found that the liners suffered increased wear and the
recoil system could not handle the increased loads in spite of the brake. This led to a more interesting modification,
the introduction of the 15cm R. Gr. 19 FES ammunition, which used a rocket-assisted round that could reach
18,200m and give it some level of parity with the Soviet A-19 gun-howitzer. Finland bought 48 15cm sFH18 howitzers
from Germany in 1940 and designated them 150 H/40.