He participated in a number of major conflicts such as the Second Siege of Missolonghi (1823) under Kitsos Tzavelas and the Battle of Domvraina. He also fought in the Battle of Arachova (1826) under commanding general Georgios Karaiskakis. There Vagias together with revolutionary leader, Gardikiotis Grivas, commanded a force of 500 men and succeeded in annihilating an invading unit of 1,500 Ottoman-Albanians.