Poland did not stabilize in the wake of Mieszko's exile, forcing Conrad to convene an assembly in July 1033 to issue the Treaty of Merseburg which restored Mieszko to the Polish throne. Conrad summoned Oldrich to appear at the assembly, but Oldrich refused. His absence raised the ire of the Emperor and Conrad, busy with securing his succession to the Burgundy throne, charged his son Duke Henry of Bavaria with punishing the recalcitrant Bohemian. At age 17, Henry's march on Bohemia was his first independent military command. The expedition was a complete success, as Henry deposed Oldrich and restored his brother Jaromir to the Bohemian throne. Oldrich's son Bretislaus I was appointed as Count of Moravia. Oldrich himself was imprisoned in Bavaria, but in 1034 was pardoned and allowed to return to Bohemia. Oldrich deposed and blinded Jaromir, reclaimed the Bohemian throne, and exiled his son Bretislaus. While the reason for the conflict between father and son has been lost, it is assumed Bretislaus had supported Jaromir over his father. However, Oldrich died suddenly on November 9, 1034, allowing Bretislaus to return from exile. Though Jaromir was offered the throne, he declined in favor of his nephew. Bretislaus was then confirmed as the new Duke of Bohemia by emperor Conrad II.