The regiment was the basic combat unit as well as the recruiting base for soldiers. When inducted, a soldier entered a regiment, usually through its replacement battalion, and received his basic training. There were three basic types of regiment: infantry, cavalry and artillery. Other specialties, such as pioneers (combat engineers) and signal troops, were organized into smaller support units. Regiments also carried the traditions of the army, in many cases stretching back into the 17th and 18th centuries. After World War I, regimental traditions were carried forward in the Reichswehr and its successor, the Wehrmacht , but the chain of tradition was broken in 1945 as West German and East German units did not carry forward pre-1945 traditions.