Passage: According to tradition, Patrick returned to Ireland to convert the pagan Irish to Christianity. The Declaration says that he spent many years evangelising in the northern half of Ireland and converted "thousands". Patrick's efforts against the druids were eventually turned into an allegory in which he drove "snakes" out of Ireland, despite the fact that snakes were not known to inhabit the region.

Question: why did Patrick return to Ireland?
to convert the pagan Irish to Christianity