Teaching slaves to read was discouraged or (depending upon the state) prohibited, so as to hinder aspirations for escape or rebellion. In response to slave rebellions such as the Haitian Revolution, the 1811 German Coast Uprising, a failed uprising in 1822 organized by Denmark Vesey, and Nat Turner's slave rebellion in 1831, some states prohibited slaves from holding religious gatherings, or any other kind of gathering, without a white person present, for fear that such meetings could facilitate communication and lead to rebellion and escapes.