The death of William Henry Harrison had significant consequences, including the collapse of a major political party. And the story of how he died that most of us learned in school is almost certainly false. In fact, he might well have been the victim of a serial killer of presidents- the water in Washington DC.
The Reconquista, or Christian reconquest of Iberia, took nearly 800 years. The fighting did not come without great attempts by Muslim powers across the strait trying to reestablish their presence in mainland Europe. The last gasp of that effort came in the 1330s, when the powerful Marinid sultanate of what is modern Morocco invaded in an attempt to reverse Christian gains and secure the perilous position of the Sultanate of Granada.