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The Mückenberger Fleet first existed around the time of the Second Battle of Tiamat as the force under the leadership of Vice Admiral Wilhelm von Mückenberger, the father of Gregor. He and his fleet fought against the Alliance forces at Second Tiamat in late 745 UC (436 IC / 3545 CE). During the battle, his fleet was caught between the Alliance's 5th and 11th Fleets, and sustained heavy casualties. Vice Admiral Mückenberger himself was killed in action aboard the fleet's flagship, the Quermark, when it was destroyed by an Alliance battleship. (SL: 'The Man Loved by the Goddess of Time: Chronicle of the Second Battle of Tiamat, Part I')
Under his command, the Fleet took part in the Sixth Battle of Iserlohn, in 794 UC (485 IC / 3594 CE), where it assisted in fighting off the attacking Alliance forces. The Mückenberger Fleet also fought at the Battle of Van-Fleet, with its flagship being the battleship Wilhelmina. It later took part in the military campaign launched in 794 UC (485 IC / 3594 CE), for the 30th anniversary of the ascension to the throne of Kaiser Friedrich IV. in the resulting Third Battle of Tiamat, it fought against Vice Admiral Willem Holland's 11th Fleet as it tore through the main Imperial formation (including the Mückenberger Fleet). Eventually, it withdrew and allowed Reinhard von Müsel to give the enemy heavy damage with an artillery barrage. The Alliance retreated after Holland was killed in that attack, ending the battle. The Mückenberger Fleet also fought at the Fourth Battle of Tiamat, taking significant casualties inflicted by the Alliance, but ultimately winning the engagement. (HBSHBL: 'The Battle of Van-Fleet Starzone', 'The Sixth Battle of Iserlohn', TBT: 'Part One', My Conquest Is the Sea of Stars)
It was presumably dissolved after Mückenberger retired from the military in late 796 UC (487 IC / 3596 CE).
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