From the announcement:
Germany's Southwest Africa colony (Deutsche Sud-West Afrika, DSWA) was defended by a security force made up completely of German troops. These troops were known as Schutztruppe and were all mounted infantry supported by artillery crews.
This artillery crew is designed to man the Krupp 75mm mountain gun.
Crew consists of one gunner holding a shell, one watching the effect of fire, and two working the gun.
In addition to the Mountain Artillery crew, here is also a Field Artillery crew.
This artillery crew is designed to man the Krupp 77mm field gun. The limber shown below is the German Limber A-6.
Crew consists of one gunner holding a shell, one with a bar, and two pushing the wheels. The 77mm guns were not recoilless, so the guns would be manhandled into position and re-positioned after each firing.