· Administrative change
Pedro's regency and the 1821-22 crisis
King John VI returned to Portugal in February 1821, leaving his son Pedro as regent of Brazil; when the Portuguese Côrtes demanded in January 1822 that Pedro also return, he refused, precipitating the crisis that led to the September 1822 proclamation of independence.
Significance here: The political background from which the Cry of Ipiranga emerged.