Dertien-class pocket battleship

The Dertien-class pocket battleship, classified by its designers as Security Ships (Dutch: Veiligheidsschip), was a rather heavy and well-built battleship built by Hansenstad SSB for the United Liberation Front. A very carefully-designed warship, the Dertien-class was exceptionally durable for a ship of its size, which allowed it to directly challenge the UNSC Navy's fleet of formidable capital ships.

Role
The Dertien-class battleships had the contradictory honor of being one of the least well-armed capital ships to be pressed into insurgent service, and yet were also one of their most aggressively-oriented designs. This was because they were built to act as raider leaders, where they sought out enemy capital ships to tie them down, leaving whatever convoy or vital installation they were protecting open to strikes from smaller attack craft. Once this was done, the Dertiens would use their superior speed to withdraw from the battle, even if they were winning the fight. This was because the disruption of the UNSC's troop movements or logistics was far more significant than the loss of even a battleship. Moreover, forcing a battleship to withdraw for months if not years of repairs and refits achieved the same immediate result as destroying it. Indeed, the sheer threat these warships represented meant that oftentimes they did not even need to show up to draw UNSC ships out of position.

While a sound use in theory, the ULF's shortage of large warships meant that they were loath to risking the Dertiens to excessive damage. Though effective cruiser-hunters, the Dertiens were gradually used more and more for ferrying VIPs and high-value cargo that could not be reliably trafficked by even destroyers, despite lacking any form of large cargo capacity. Most were even used to stage secure conferences between leaders of various ULF factions.

Namesakes
The lead ship of the class, the Onverzettelijke Dertien (the Unyielding Thirteen), owes its name to the infamous criminal group of the same name. Active during Kust's early colonial years, they ruthlessly preyed on convoys operated by various mining corporations on the planet until they perished in a defiant last stand during their greatest heist... and unknowingly allowed much of Kust's dutch colonists to escape corporate servitude that plagued nearby worlds. In this way, Hansenstad SBB hopes their newest battleship can mimic the success of these freedom fighters and inspire others across the Human Sphere to throw off the shackles of Earth and their predatory affluent allies.