The island's tranquility lasted until 1287, when Alfonso III of Arag??n, smarting over a series of humiliations at the hands of his nobles, found a pretext for invasion.
The island remained peaceful, as Alfonso III of Arag decided not to invade it. 
mnli hypothesis: The island remained peaceful, as Alfonso III of Arag decided not to invade it.  premise: The island's tranquility lasted until 1287, when Alfonso III of Arag??n, smarting over a series of humiliations at the hands of his nobles, found a pretext for invasion.