Simplify the following text for a Grade 12 native English-speaking person.
Original: The Evangelical Christian Church , also known as `` Christian Disciples '' became the Stone-Campbell Movement , also called the American Restoration Movement which arose on the frontiers of early nineteenth-century America .
Simplified: The church is important for what is called the Stone-Campbell Restoration Movement or the American Restoration Movement , which wanted to re-unite the different Christian Churches .