The Boxer Rebellion took place in China, especially in northern China, around 1900. It was an anti-foreign and anti-Christian uprising directed against Western and Japanese influence during the final years of the Qing dynasty.
The movement’s participants were known as Boxers because many practiced martial arts and traditional physical exercises. Their Chinese name, Yihetuan, is often translated as the Society of Righteous and Harmonious Fists. The uprising grew from economic hardship, resentment of foreign concessions, missionary activity, and political instability.
In 1900, Boxer forces and Qing imperial troops attacked foreign communities and besieged the diplomatic legations in Beijing. An Eight-Nation Alliance, including Japan, Russia, Britain, France, the United States, Germany, Italy, and Austria-Hungary, sent troops to relieve the siege.
The conflict did not end exactly in 1900: fighting and diplomatic consequences continued into 1901. The Boxer Protocol, signed in September 1901, imposed a large indemnity on China and expanded foreign military and political privileges. “China” is therefore the clear canonical country answer.