Concordat

As the Duly Appointed Enforcer of the Tyrest Accord, Fortress Maximus uses the Concordat as his personal ship.

IDW Generation 1 continuity
Fortress Maximus and Red Alert travelled to the planet Tebris VII in the Concordat to apprehend the renegade Decepticon Demus who had been lobotomising Transformers with beast modes and selling them as "Roboid" torture dolls. As they arrived in orbit Red noticed the Weak Anthropic Principle crashed on the planet's surface, revealing the presence of the Scavengers, and Maximus resolved to deal with them after he'd taken care of Demus. One summary execution later Max was tricked into going after Grimlock aboard the W.A.P. but was ultimately outwitted by the quick-thinking (and lucky) Scavengers. He was even more surprised to learn that they had discovered a way to undo the damage Demus had wrought on the Roboids and returned to the Concordat with the survivors for treatment.