Byzantine–Hungarian War (1127–1129)
[15] In Hungary, the defeat at Haram undermined Stephen II's authority and he faced a serious revolt when two counts, named 'Bors' (possibly Boris Kalamanos) and 'Ivan', were declared kings.[14] John Kinnamos wrote of a second campaign by Stephen against the Byzantine Empire,[17] when the Hungarian troops, supported by Bohemian reinforcements under the command of Duke Václav of Olomouc, took Braničevo by storm and destroyed its fortress.[18] The returning John II convicted Kourtikios – leader of the Byzantine garrison – of a charge of high treason, despite that the commander did not abandon the besieged fort until its capture.[20] The Hungarians had renewed hostilities, possibly so that King Stephen could be seen to reassert his authority, by attacking the Byzantine frontier fortress of Braničevo, which was immediately rebuilt and fortified by John.The emperor was forced to retreat to the valley of Mlava river, but the advancing Hungarians defeated his army's rearguard at the strait of Ždrelo (called Evil Stair).