Thursday 28th December 1944
Went out to check a gun and to get things straight then to locate second line SP’s.
Traffic jams so I missed the England v Rest match.
SP appears to refer to a self-propelled gun (SPG) is a form of self-propelled artillery, and in modern use is usually used to refer to artillery pieces such as howitzers.
Self-propelled guns are mounted on a motorised wheeled or tracked chassis (because of this they are sometimes mistaken for tanks). As such the gun can be maneuvered under its own power as opposed to a towed gun that relies upon a vehicle or other means to be moved on the battlefield. Self-propelled guns are combat support weapons; they are employed by combat support units fighting in support of, or attached to, the main combat units: infantry and armour. Self-propelled guns are best at providing indirect fire but can give direct fire when needed. It may be armoured, in which case it is considered an armoured fighting vehicle (AFV). Typically, self-propelled guns are more lightly armoured and may not have turrets and their purpose is distinct from that of tanks.
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