Battle of Cannae
From commentaries on a series of manuscripts of the works of Plutarch, it is known that Nicholas died in battle against the Bulgarians; the commentaries compare his death to that of Lucius Aemilius Paullus at the Battle of Cannae. M. Manfredini, the editor of these manuscripts, identified the battle with the disastrous Byzantine defeat at the Battle of Acheloos on 20 August 917.