The Fists of Righteous Harmony (義和拳) was a society in China that executed the unsuccessful Boxer Rebellion in the closing years of the 19th century. They were anti-foreign (originally against the government, but eventually turning against the Christian converts and the colonizing foreign powers). They got their western nickname "The Boxers" from their unique style of kung fu. They believed that they could, through training, perform strange feats like flying and being immune to the westerner's bullets.
The movement has many striking similarities to the Ghost Dance cult of American Indians.