Political map of North America & the Caribbean 5 December 1837 (Canadian Rebellions): In the north, the British colonies of Upper and Lower Canada were growing in population but still found themselves dominated by local trading oligarchies. Increasing dissatisfaction led to calls for government reform and rebellions in 1837 (Rebellions of 1837). Although the first revolts were quickly suppressed, many rebels fled to the US border and continued the fight from there (Patriot War).