After the Latin Empire collapsed, the Byzantines, taking advantage of a Bulgarian civil war, captured portions of Thrace, but the Bulgarian emperor Theodore Svetoslav retook these lands.
Setelah Kekaisaran Latin runtuh, Bizanitum, mengambil keuntungan dari perang saudara Bulgaria, merebut sebagian wilayah Thrakia, namun kaisar Bulgaria Theodore Svetoslav merebut kembali wilayah tersebut.