The Siegfried class was the first true dreadnought to enter service. As originally completed the class mounted the extremely powerful FLM-1 Cannon, this weapon was limited in terms of arcs of fire and recharge time, but used well was an extremely effective weapon. In 2242 some of the class were refitted to a more standard configuration due to delays in the Constitution class program, and were refitted with the new Unary shielding systems. In this revised configuration these ships gave valuable service for a number of years, although later on only in supporting roles

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