Charlemagne 's army is compared to the French army that aided Alfonso VI in 1087 after the Battle of Sagrajas ( 1086 ) .
Charlemagne 's army the French claimed had conquered parts of Spain .
Charlemagne 's army , whom the French claimed had conquered parts of Spain , is compared to the French army that aided Alfonso VI in 1087 after the Battle of Sagrajas ( 1086 ) .