David conquered as far west as Heraclea Pontica, across the Sea of Marmora from Constantinople, where his general Synadenos was defeated by Theodore I Laskaris; this defeat forced David to recognize the western limit of his possessions.
David conquered as far west as Heraclea Pontica, across the Sea of Marmora from Constantinople. However, his general Synadenos was defeated by Theodore I Laskaris outside of Nicomedia, and this defeat forced David to recognize the western limit of his possessions.