It had 400 artillery pieces bolstered by heavy artillery and mortars. Howitzers are one of two primary types of field artillery. Spain was unable to mobilize its artillery or cavalry. This doctrine led to heavy casualties from artillery fire. These forces included tank, artillery and airborne forces. This makes incendiary grenades useful for destroying weapons caches, artillery, and vehicles. He served as a Lance Bombardier in No.132 Field Regiment of the Royal Artillery. Gunners of the Royal Artillery wore blue jackets. It was under constant bombardment by DPR artillery. They are usually equipped with railroad cars armed with artillery and machine guns. Five vehicles are operated by the 5th Regiment Royal Artillery. There are 8 active artillery divisions consisting of a number of artillery brigades. However they were vulnerable to a direct hit from artillery and mortar shells. The KPA had a combined arms force including tanks supported by heavy artillery. The formulations were slightly different for artillery and naval use.