Widespread rumors of Napoleon's return from St. Helena and Napoleon as an inspiration for patriotism, individual and collective liberties, and political mobilization manifested themselves in seditious materials, displaying the tricolor and rosettes. There were also subversive activities celebrating anniversaries of Napoleon's life and reign and disrupting royal celebrations—they demonstrated the prevailing and successful goal of the varied supporters of Napoleon to constantly destabilize the Bourbon regime.

Answer this question, if possible (if impossible, reply "unanswerable"): Anniversaries of Napoleon's life and reign were sometimes celebrated in an effort to disrupt what?
royal celebrations