While there can be a legitimate question over whether the fastest time that a person has ever run the hundred meter hurdles while wearing swimming fins (14.82 seconds) really deserves to be remembered, certainly a few record attempts at least fall into the category of history stranger than fiction.
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.