Primus Class Battleship

"'What the hell is that thing!?' Finn upon seeing the 'X0011' during the 3rd battle of Ryloth "The Primus-class battleship, also designated by the New Republic, Resistance, and the First Order as the Killer-Class Battleship, was the class of battleships manufactured by The Unity. They were used by the Unity during their conflict with the Eternal Alliance during the Alliance war and later during their renewed attempt to assimilate all organic life in the galaxy.

It was also believed that the ships were partially self-aware and sentient, as one blasted a clone trooper pilot who got too close to its hanger bay even though said clone trooper wasn't a threat or aware of the hanger bay. They have been noted to display motherly instincts as one destroyed the First Order Star destroyer "Hux's Revenge" after a squadron of Ameoba's were destroyed by the ships TIE fighters. The Ships also seem to be linked with the Hive mind of the Unity and can predict enemy movements.

Size
The Primus-class were the largest ships ever seen in the galaxy. They dwarfed all enemy warships. Though themselves were dwarfed by the Alpha class Titans which were 2000 kilometers longer. Its size and overall volume often lead it to be mistaken as a Planet or space station, which was often used to the Unity's advantage allowing them to capture curious enemy scouts and launch surprise attacks on enemy forces.

Offensive and defensive systems
The Primus was bristling with superior and advanced weapon systems and used advanced targeting systems to increases it weapons range and accuracy. Much like the ancient Mandalorian ships, the Primus and other Unity ships can charge their weapons while in hyperspace this allowed them to effectively neutralize enemies and obliterate entire planets with ease.

The Primus was equipped with advanced shielding technology, which made their ships virtually invincible also due to their large size they were immune to most weapon fire. The Primus can also if the need arises ram enemy ships and stations and survive intact due to their strengthened hull and shields.

Propulsion systems
The Primus despite its huge size was more nimble, and faster being equipped with dark matter based technology increased its speed and agility in combat, they also retain this speed when planetside making them perfect mobile weapons platforms when the need arises and perfect bases for directing ground battles and overseeing occupation forces.

Complement
The Primus class carried a huge number of semi-sentient biologically engineered starfighters such as Amoeba Flagella and a Cyborg version, Swarm strikers, and bioorganic troop transports and semi-sentient devices that automatically construct a ground base in seconds.

The Hanger bays are well hidden and enemies often end up flying literally right by it, a prime example would during a time warp the Unity invasion fleet and the New Republic-Resistance-First Order Alliance is transported to the Clone wars during the liberation of Ryloth, a clone pilot flew right by a Primus class battleships hanger only to be destroyed by the hangers defense systems.

Bridgetower
The Bridge is well hidden, due to the ships overall simple design it can be easily overlooked making it difficult to take down the bridge, it is also well defended, well armored, and well shielded making attacks virtually impossible. The bridge is believed to be located in one of two block-like structures located in the neck of the ship.

History
"'The wars were brutal, but non so more than when the massive Unity battleships clashed with the  ships of the Eternal Alliance, and the sky was alive with fire and light.' Themisa a Voss Mystic recounting the battle of Therotha to Ahoska Tano and Captain Rex during the clone wars"During the Alliance wars, the Primus Battleships served as flagships for the Unity fleets, the ships would clash with the Eternal Alliance in a war that lasted for a Thousand years and saw the collapse of the Eternal Alliance and the defeat of The Unity. The Primus battleships served as carriers, flagships, and battleships, they also when planetside served as mobile weapons platforms and mobile command centers for Unity generals directing their forces in battles. Records are scarce and the only reliable source comes from the Voss