膠州湾租借地
After a minor British naval attack on the German concession in Shandong (Kiautschou Bay concession) in 1914, Japanese Empire troops occupied the city and the surrounding province during the Siege of Tsingtao after Japan's declaration of war on Germany in accordance with the Anglo-Japanese Alliance. China protested against Japan's violation of her neutrality but was not able to interfere in the military operations. The decision of the Paris Peace Conference and the Versailles Treaty negotiations not to restore Chinese rule over the previous foreign concessions in Qingdao after the Great War triggered the May Fourth Movement (4 May 1919) of anti-imperialism, nationalism and cultural identity in China.