The most long-term result of the fall…
843 CE
The most long-term result of the fall of Amorium is in the religious rather than in the military sphere.
Iconoclasm was supposed to bring divine favor and assure military victory, but neither the army's weaknesses nor the reported treachery of Boiditzes could detract from the fact of the disastrous defeat.
A little over a year after Theophilos's death, on March 11, 843, a synod restores the veneration of icons, and iconoclasm is declared heretical, but a conciliatory ecclesiastical policy is directed towards the Iconoclasts.
Also beginning in 843, campaigns undertaken against the Slavs in Greece and against the Arabs in Asia Minor, the Aegean, and the Nile Delta meet with some success.