Battle of Mollerussa
1102 CE.
Shown on the map at 41.632°, 0.896°.
The Battle of Mollerussa (or Mollerusa) took place in the south of the county of Urgell on 11 or 14 September 1102. In the battle, Count Ermengol V was defeated and killed by an Almoravid army. Mollerussa lies halfway between Bellpuig and Lleida and is the largest town in the Pla d'Urgell.
Text from the Wikipedia article Battle of Mollerussa, licensed CC BY-SA 4.0.