Complex sentence: In 1807 the British Parliament passed the Slave Trade of 1807 abolishing the importation of African slaves into British territories: because of this increased bilateral trade, Christophe had gathered an enormous sum of British pounds for his treasury.
Split into simpler sentences: In 1807 the British Parliament passed the Slave Trade Act of 1807 with the intent of abolishing the importation of African slaves into British territories. Because of increased bilateral trade with Britain, Christophe gathered an enormous sum of British pounds for his treasury.