Brazilian Revolution By windblade7 Period: Jan 1, 1800 to Jan 1, 1830 Revolution Timeline Oct 1, 1807 Napolean's armies invade both Spain and Portugal. Jun 14, 1815 Napolean's armies are defeated Oct 20, 1821 Portugese government is returned to Protugal Mar 20, 1822 Creoles demand Brazil's independence from Portugal Sep 7, 1822 8,000 Brazilians sign petition to have Dom Pedro rule.