Bagrationovsk bəgrŭ˝tyēô´nəfsk [key], town, NW European Russia, formerly in East Prussia, on the Polish border. Its German name was Eylau or Preussisch Eylau. It is a rail terminus and has meat-processing and dairy industries. The town was founded in 1336. In Feb., 1807, it was the site of a bloody, indecisive battle between Napoleon I and the allied Russian and Prussian forces that checked Napoleon's movement toward the Russian frontier. The town is named in honor of Gen. P. I. Bagration , who distinguished himself during the battle.

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