The Battle of Naissus (268 or 269 AD) was the defeat of a Gothic coalition by the Roman Empire under Emperor Gallienus (or Claudius II) and Aurelian near Naissus (Niš in present-day Serbia). The events around the invasion and the battle are an important part of the history of the Crisis of the Third Century. The result was a great Roman victory which, combined with the effective pursuit of the invaders in the aftermath of the battle and the energetic efforts of the future Emperor Aurelian, largely removed the threat from Germanic tribes in the Balkan frontier for the following decades.