The Battle of Vyborg was a 1918 Finnish Civil War battle, fought 24–29 April between the Finnish Whites against the Finnish Reds in Vyborg (Finnish: Viipuri). Together with the Battle of Tampere and Battle of Helsinki, it was one of the three major urban battles of the Finnish Civil War. The battle is also remembered because of its bloody aftermath, as the Whites executed up to 400 non-aligned military personnel and civilians of Russian and associated ethnicities.