Comparing: Challenger vs. AT 15A

Created in 1942 based on the extended chassis of the Cromwell. One definite advantage of the new vehicle was its 17-pounder gun, which was the most powerful British gun at that time. This allowed the tank destroyer to effectively hit the enemy at distances up to 1,000 meters. However, the vehicle had a large silhouette and the chassis was overloaded. A total of about 200 vehicles were built.

Assault tank conceived for breakthrough attacks on enemy fortifications. The design project was ready on October 5, 1943. No prototypes were built. However, the project became the basis for the A39 Tortoise heavy assault tank.