The Christian Association of Washington was an organization established by Thomas Campbell in 1809 to promote Christian unity.[1]: 173 It was a study group that Campbell formed with like minded friends and acquaintances in the local neighborhood of Washington, Pennsylvania.[1]: 173 [2]: 80, 106 The group sought to foster unity by focusing on a common form of Christianity that they could all agree upon.[1]: 173 [2]: 106 This charter that Campbell wrote for this group, the Declaration and Address of the Christian Association of Washington, became one of the most important early texts of the Restoration Movement.[1]: 173 [2]: 80, 106 [3]: 140
Encyclopedia of the Stone-Campbell Movement: Thomas Campbell
was invoked but never defined (see the help page).