Panzergrenadier (), abbreviated as PzG (WWII) or PzGren (modern), meaning "Armour"-ed fighting vehicle "Grenadier", is a German term for mechanized infantry units of armoured forces who specialize in fighting from and in conjunction with infantry fighting vehicles (IFVs) – that is, armoured troop carriers designed to carry a mechanized squad of six to eight soldiers into combat while providing direct fire support for those troops. Panzergrenadier combat is conducted in close cooperation with IFVs. Each Panzergrenadier squad has its own designated IFV during battle. Combat can be conducted either from within the vehicle (so-called "mounted combat") using portholes in the walls or hatches on the roof, etc., or from outside the vehicle in its vicinity (so-called "dismounted combat") using dismount-hatches at the back of the vehicle. Combat missions consist of ambushing, fire support, reconnaissance, spearhead attacks, etc. Depending on the armament, the IFV can have a varying degree of active participation in the battle. Early examples simply featured a pair of rifle-calibre machine guns. Modern day examples traditionally use medium-caliber () autocannons and integrated missile-systems in a revolving turret. Unlike traditional mechanized infantry, Panzergrenadiers do not use armoured personnel carriers (APCs) in their doctrine, as such per-design lack the ability for mounted combat, being intended as "armoured taxis". The Panzergrenadier doctrine and name is primarily used in the armies of Germany, Austria, Switzerland and Sweden, in the latter under the native forms "pansarskytte" ( = ) and "pansarinfanteri" ("armour infantry"). In the modern German Army, Panzergrenadier (Pzg) is the lowest rank of enlisted men (Mannschaften) in the Panzergrenadiertruppe, comparable to NATO Other Rank-1 level. The Panzergrenadier doctrine was introduced by the German Army during the second half of the 1930s, initially being simple infantry () belonging to the armoured force (so-called "armoured infantry"), serving either as mechanized or motorized infantry depending on their mode of transportation (infantry fighting vehicle vs unarmoured vehicle). IFVs () were the preferred vehicle of transportation for the armoured infantry, but due to shortages, most units had to be transported in trucks as motorised infantry. The role of the armoured infantry was to escort and protect the armoured force from enemy infantry, allowing allied armour to deal with heavier threats. Mounted combat in IFVs could also be used in advancing assaults on to the enemy flanks. The success of this tactic during the first years of World War II led to the introduction of a new