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'''Starbase 257''' was a [[Federation]] [[federation starbases|starbase]] located in the [[Alpha Quadrant]]. While within its defense perimeter, ships had to remain at one-half [[impulse drive|impulse]]power.

In [[2374]], the starbase was attacked by a wing of [[Jem'Hadar fighter]]s, shortly after the [[runabout]] {{''USS|Shenandoah}} '' had left the station ''en route'' to [[https://memory-alpha.fandom.com/wiki/Ferenginar Ferenginar]].