Treaty of Tientsin
A major cause of discontent in north China was missionary activity. The Treaty of Tientsin (or Tianjin) and the Convention of Peking, signed in 1860 after the Second Opium War, had granted foreign missionaries the freedom to preach anywhere in China and to buy land on which to build churches. On 1 November 1897, a band of armed men who were perhaps members of the Big Swords Society stormed the residence of a German missionary from the Society of the Divine Word and killed two priests. This attack is known as the Juye Incident.