The Eight-Nation Alliance was a multinational military coalition that invaded northern China in 1900 during the Boxer Rebellion, with the stated aim of relieving the foreign legations in Beijing, which were being besieged by the popular Boxer militiamen, who were determined to remove foreign imperialism in China. The allied forces consisted of about 45,000 troops from the eight nations of Germany, Japan, Russia, Britain, France, the United States, Italy, and Austria-Hungary. Neither the Chinese nor the quasi-concerted foreign allies issued a formal declaration of war.