John the Armenian was a Byzantine official and military leader. He was killed during the Vandalic War in 533. John the Armenian commanded the Byzantine vanguard at the Battle of Ad Decimum, and killed Ammatas the brother of the Vandal king Gelimer near Carthage. John fought in the center of the Byzantine army during the subsequent Battle of Tricamarum. After the Byzantine victory there, Belisarius tasked him with Gelimer's pursuit and gave him 200 cavalry. John almost caught up with Gelimer, but he was accidentally killed by Uliaris, one of Belisarius' bodyguards. According to Procopius, he was much loved and his death was widely mourned.