Scammell Pioneer is a British heavy truck of the World War II period. The first units of this vehicle were built in 1927, and serial production lasted from 1927 to 1945. During its course, about 3,400 units of this vehicle were produced. The drive was provided by a single Gardnem Diesel engine with an output of 102 HP.

Scammell Pioneer was originally created as a basic means of transport and an artillery tractor for British troops stationed primarily in the colonies. The vehicle was suitable for use in the field, was characterized by high mobility, durable suspension and considerable towing capacity. During the production, several versions of this vehicle were created. One of the most numerous was the version of the artillery tractor (Pioneer R100) and the technical support vehicle (Pioneer SV1T and SV2S). There was also a tractor version for damaged tanks with a load capacity of 20 tons (Pioneer TRCU20) and 30 tons (Pioneer TRCU30). Scammell Pioneer trucks had their baptism of fire in 1940 during the campaign in France. Later they also served, among others, in North Africa (1940-1943).

The Crusader was a British cruiser tank from World War II. The first prototypes were built in 1939, and serial production lasted from 1940-1943. In total, about 4,900 units of this tank were built. The Crusader was powered by a Nuffield Liberty Mk II engine with 340 hp. The vehicle's armament consisted of - depending on the version - a single 40 mm QF 2-pounder gun or a single 57 mm QF 6-pounder gun and two 7.92 and 7.7 mm machine guns.

The Crusader tank was designed as a successor to the unsuccessful Convenanter A13 vehicle. First of all, the new tank was designed more carefully, which meant that it had a much lower failure rate than its predecessor. Its armour was also improved. Despite these changes, the Crusader, when it entered service, still had much too weak armour and, above all, too weak armament to combat enemy tanks. Its strengths, however, included the aforementioned low failure rate and good mobility. Nevertheless, after the end of the North African campaign (1940-1943), in which Crusader tanks played a major role, they were systematically and quickly withdrawn from front-line units. During the mass production, several versions of this tank were created. Chronologically, the first was the Crusader I, which was the first mass-produced version of this tank. In May 1942, the Crusader III version debuted, which had a new 57 mm gun and armor reinforced to 51 mm. After 1943, numerous specialist vehicles were created on the Crusader tank chassis, such as the Crusader II Gun Tractor artillery tractor or the Crusader III AA Mk. I and II self-propelled anti-aircraft gun. Crusader tanks found themselves in the Free French units, in Australian and New Zealand units. They also entered the equipment of the Polish Armed Forces in the West (PSZ).