He 112 (Germany)

A German single-engine fighter aircraft developed in the 1930s. Although initially favored over the Bf 109, it was ultimately outperformed and production was discontinued.

Hd-37 (Soviet Union)

A Soviet heavy tank design developed during World War II. It featured a 152mm gun and thick armor, but it was never built due to resource constraints.

He 115 (Germany)

A German maritime patrol and reconnaissance aircraft used by the Luftwaffe during the early stages of World War II. It played a significant role in the Battle of the Atlantic.

Hd-38 (Soviet Union)

A Soviet heavy tank design developed during World War II. It featured a 203mm gun and exceptionally thick armor, but it was never built due to the war’s end.

Hd-39 (United Kingdom)

A British heavy tank prototype developed during World War II. It featured a 17-pounder gun and thick armor, but it was not adopted due to its high cost.

Hd-40 (United Kingdom)

A British heavy tank design developed during World War II. It featured a 20-pounder gun and even thicker armor than the Hd-39, but it was never built due to the war’s end.

Hd-41 (Italy)

An Italian heavy tank design developed during World War II. It featured a 90mm gun and thick armor, but it was never built due to resource constraints.

Hd-42 (Italy)

An Italian heavy tank design developed during World War II. It featured a 105mm gun and even thicker armor than the Hd-41, but it was never built due to the war’s end.

Hd-43 (France)

A French heavy tank design developed before World War II. It featured a 75mm gun and thick armor, but it was never built due to the French defeat in 1940.

Hd-44 (France)

A French heavy tank design developed during World War II. It featured a 90mm gun and even thicker armor than the Hd-43, but it was never built due to the French defeat in 1940.