Mammoth Mk. I

During the First Tiberium War, a few minor changes were made to the original Soviet Mammoth tank prior to it's deployment in the field. These changes were the subject of one of the first X Weapons Projects of GDI. The basic design was kept the same, with twin 120 mm armor piercing cannons, autohealing ability and Mammoth Tusk missiles, but the missiles were altered. They were larger and heavier, which meant that though they were more effective against tanks than infantry, they had a much longer reload time, and powered by internal nuclear generators.

The new generation Mammoth tanks were developed at a secret GDI facility in South Africa, but nothing can be kept secret for long when the Brotherhood is involved. A sneak attack of infantry and support from an artillery managed to destroy the production center and the prototype, delaying the arrival of Mammoth tanks on the battlefield.

According to these schematics, the tank was over four meters high.

After the tank was pulled back from regular duty, the Forgotten managed to acquire a few abandoned units and used them during the Second Tiberium War, although by that time, the tank was antiquated and comparatively less powerful.