n By edcdzdsd 1822 Brazilians declare independence independence from portugal 1823 Santa Anna rebels against Mexico's emperor Agustin de Iturbide 1825 Erie Canal completed 1826 Fredonian Rebellion begin 1829 London's Metropolitan Police formed 1830 Baltimore & Ohio Railroad opens first stretch of track 1830 Law of April 6, 1830, stops immigration from United States 1831 Cholera epidemic kills tens of thousands in Egypt 1833 Convention of 1833 prepares new states constitution