M1 Abrams

Let me introduce you to the pride of the US Army. Behold! Our Ultimite Tank the M1 ABRAMS SUPER TERROR TANK!Some US General said this in the G1 Series to Optimus Prime

The M1 Abrams is the most notable vehicle in the Transformers Series mostly as the Decepticon forces vehicle mode.

The M1 Abrams in the Transformers History

In the Generation 1 series Megatron is an Abrams tank in alternate mode after his gun mode.

From Teletraan I: The Transformers Wiki, a Wikia wiki.