Complex sentence: In time, some Acadians returned to the Maritime provinces of Canada, mainly to New Brunswick because they were barred by the British from resettling their lands and villages in what became Nova Scotia.
Split into simpler sentences: In time, many Acadians returned to the Maritime provinces of Canada, most specifically New Brunswick. Most who returned ended up in New Brunswick because they were barred by the British from resettling their lands and villages in the land that became Nova Scotia.