Ds. 3600 – Sukhoi Su-7

A Soviet supersonic jet fighter that was used by the Soviet Air Force (VVS) and several allied air forces during the Cold War.

Ds. 3700 – Sukhoi Su-9

A Soviet supersonic interceptor aircraft that was used by the Soviet Air Force (VVS) during the Cold War. It was designed to intercept enemy bombers.

Dr. 3700 – Leopard 1

A German main battle tank that was introduced in 1965. It was known for its speed and maneuverability, and featured a powerful 105mm gun.

Dr. 3800 – M60 Patton

An American main battle tank that was introduced in 1960. It featured a powerful 105mm gun and a new suspension system, and became the mainstay of American armored forces for many years.

Dr. 3900 – T-62

A Soviet main battle tank that was introduced in 1961. It featured a powerful 115mm gun and a new composite armor design, and became a significant upgrade over the T-55.

Dr. 4000 – AMX-30

A French main battle tank that was introduced in 1966. It featured a powerful 105mm gun and a new suspension system, and became a popular export tank.

Dr. 4100 – Challenger 1

A British main battle tank that was introduced in 1983. It featured a powerful 120mm gun, advanced armor protection, and a sophisticated fire control system.

Dr. 4200 – Leopard 2

A German main battle tank that was introduced in 1979. It featured a powerful 120mm gun, advanced armor protection, and a sophisticated fire control system, and became one of the most advanced tanks in the world.

Dr. 4300 – M1 Abrams

An American main battle tank that was introduced in 1980. It featured a powerful 120mm gun, a turbine engine, and advanced armor protection, and became the mainstay of American armored forces.

Dr. 4400 – T-72

A Soviet main battle tank that was introduced in 1973. It featured a powerful 125mm gun, a new composite armor design, and a more powerful engine, and became the mainstay of Soviet armored forces for many years.