More generically, the concept has been referred to as "pax imperia", (sometimes spelled as "pax imperium") meaning "imperial peace", or—less literally—"hegemonic peace". Raymond Aron notes that imperial peace—peace achieved through hegemony—sometimes, but not always—can become civil peace. As an example, the German Empire's imperial peace of 1871 (over its internal components like Saxony) slowly evolved into the later German state. As a counter-example, the imperial peace of Alexander the Great's empire dissolved because the Greek city states maintained their political identity and more importantly, embryos of their own armed forces. Aron notes that during the Pax Romana, the Jewish war was a reminder that the overlapping of the imperial institutions over the local ones did not erase them and the overlap was a source of tension and flare-ups. Aron summarizes that, "In other words, "imperial peace" becomes civil peace insofar as the memory of the previously independent political units are effaced, insofar as individuals within a pacified zone feel themselves less united to the traditional or local community and more to the conquering state."