Early in June 1944, Army commanders expressed a need for a new breed of tank that could mount either a 90mm or 105mm main gun. This request was approved by the Army Staff soon thereafter even though trials of the new T26E1 had already begun back at Fort Knox earlier that year.

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In January 1943, a new Tiger tank was ordered by the Waffenamt, this time with a turret large enough to mount the fearsome 8.8cm L/71 gun. Besides improving its tank killing capabilities, the new Tiger was also intended to be more survivable on the battlefield.

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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 Hawker Hurricane was the first monoplane to join the Royal Air Force as a fighter aircraft, capable of reaching speeds in excess of 300-mph in level flight. Often compared with the sleek-looking Supermarine Spitfire, the Hurricane, in actuality, shouldered the brunt of the fighting during the "Battle of Britain", equipping more than three-fifths of the RAF's Fighter Command squadrons.

The Char B1 had its origins in the concept of a Char de Bataille conceived by General Jean-Baptiste Eugene Estienne in the twenties. On January 27th, 1926, it was decided to build three prototypes of a Char B, based on four earlier experimental vehicles (a FAMH-model, the FCM 21, the SRA and the SRB).

The B-17, arguably World War II's most famous heavy bomber, first flew on July 28, 1935, before a crowd of reporters eager to see Boeing's new bomber take wing. It was dubbed the "Flying Fortress" by the members of the press in attendance because of its (at least for the time) heavy defensive armament.