E-10
The E-10 design was developed as a replacement of the Panzer 38(t) and the designs based on it. The 38(t) chassis was enlarged and redesigned. This new design was to be called PzKpfw 38 (d), d standing for deutsch ("German") as opposed to (t) for tschechisch ("Czech"). The designs based on this new chassis would all be in the 10 to 25 tonnes weight class.
The intention was to create several new light tank destroyers as a replacement for the Jagdpanzer 38(t), as well as a new family of Waffenträger armed with heavy anti-tank guns.
Read more about this topic: Entwicklung Series