The Sturmpanzer was a development of the Panzer IV tank designed to provide a vehicle offering direct infantry fire support, especially in urban areas. It used a Panzer IV chassis with the upper hull and turret replaced by a new casemate-style armored superstructure housing a new gun, the 15-centimetre (5.9 in) Sturmhaubitze (StuH) 43 L/12 developed by Skoda.

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The "Churchill" began life as a 1939 requirement that envisaged a return to trench-warfare, and was therefore slow and heavily armored like the Russian KV-1 series. That said, the final Churchill prototype was much lighter than had first been thought acceptable, although it still resembled a World War I tank in appearance.

The Northrop P-61 Black Widow, named for the American spider, was the first operational U.S. military aircraft designed specifically for night interception of opposing aircraft, and was the first aircraft specifically designed to use radar.

The first generation T-34 medium tank made its debut in combat during the summer of 1941, when the Wehrmacht launched its invasion of the Soviet Union. The T-34 easily outclassed the German PzKpfw III and IV models, thanks to its hard-hitting 76.2mm main gun, thick frontal armor, wide tracks, and overall superior mobility.

The M5 Stuart light tank made its debut in the invasion of Casablanca in French North Africa. By 1943, and at the time of the invasion of Sicily, the upgraded M5A1 was becoming the standard light tank of the American armored divisions. Because of limited firepower, the M5A1 eventually took on reconnaissance and escort duties in Italy and, after the invasion of Normandy, throughout Europe.

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Built by North American, with no previous experience on multi-engined aircraft, the B-25 Mitchell proved to be one of the most versatile combat aircraft to see action in World War II.