Hd-30 (France)

A French heavy tank design developed during World War II. It featured a 90mm gun and even thicker armor than the Hd-29, but it was never built due to the French defeat in 1940.

Hd-31 (Germany)

A German heavy tank design proposed in 1944. It featured a 128mm gun and exceptionally thick armor, but it was never built due to resource constraints and the war’s end.

Hd-32 (Germany)

A German heavy tank design proposed in 1945. It featured a 150mm gun and even thicker armor than the Hd-31, but it was never built due to the war’s end.

Hd-17 (Germany)

A German heavy tank prototype developed during World War II. It featured a 150mm gun and exceptionally thick armor, but it was never deployed due to its high weight and complexity.

Hd-33 (Japan)

A Japanese heavy tank prototype developed during World War II. It featured a 75mm gun and thick armor, but it was never deployed due to production difficulties.

Hd-18 (Germany)

A German heavy tank design developed during World War II. It featured a 170mm gun and even thicker armor than the Hd-17, but it was never built due to the war’s end.

Hd-34 (Japan)

A Japanese heavy tank design developed during World War II. It featured a 105mm gun and even thicker armor than the Hd-33, but it was never built due to the war’s end.

Hd-19 (Japan)

A Japanese heavy tank design developed during World War II. It featured a 105mm gun and thick armor, but it was never built due to resource constraints.

Hd-35 (United States)

An American heavy tank design developed during World War II. It featured a 105mm gun and thick armor, but it was never built due to the success of the M26 Pershing.

Hd-20 (Japan)

A Japanese heavy tank design developed during World War II. It featured a 120mm gun and even thicker armor than the Hd-19, but it was never built due to the war’s end.