A number of Islamist political parties and mujahideen called for the restoration of the caliphate by uniting Muslim nations, either through political action (e.g., Hizb ut-Tahrir), or through force (e.g., al-Qaeda). Various Islamist movements gained momentum in recent years with the ultimate aim of establishing a Caliphate. In 2014, ISIL/ISIS made a claim to re-establishing the Caliphate. Those advocating the re-establishment of a Caliphate differed in their methodology and approach. Some were locally oriented, mainstream political parties that had no apparent transnational objectives.