Military expedition in the land of the Rus'Volhynia
In 1123, the young king Stephen II launched a military expedition against the Principality of Volhynia in order to assist its expelled prince, Iaroslav Sviatopolkovich, regain his throne. Even though Sviatopolchich was assassinated at the beginning of the siege of his former seat, Volodymyr-Volynskyi, Stephen decided to continue the war. However, according to the Illuminated Chronicle, his commanders threatened to dethrone him if he continued the aggression, forcing Stephen to lift the siege and return to Hungary.
Cosma, of the line of Paznan, stood up before the King and said: "Lord, what is this thing which you are doing? If with the death of a multitude of your soldiers you take the castle, whom will you appoint as its lord? If you choose one among your nobles, he will not remain here. Or do you wish to abandon your kingdom and yourself have the dukedom? We barons will not storm the castle. If you wish to storm it, storm it alone. We are returning to Hungary and we will choose for ourselves a king." Then by order of the nobles the heralds announced throughout the camp that the Hungarians should return as speedily as possible to Hungary. When the King thus saw himself justly deprived of the help of his people, he returned to Hungary.
— The Hungarian Illuminated Chronicle