Why didn't Czar Nicholas II renounced his German titles during World War 1 like George V did?
If you look at the full title of the Russian Czar, there were some German titles, like "Duke of Schleswig-Holstein, Stormarn, Dithmarschen, Oldenburg, etc, and etc." Why didn't Nicholas renounce those titles like George V of the United Kingdom renounce his ties to Germany?