Complex sentence: After the defeat, the fateful date and the so-called "Balat Al Shuhada" of Toulouse would be still remembered in memorials by Muslims for the following 450 years, as opposed to the Battle of Poitiers, held as a minor battle.
Split into simpler sentences: After the defeat, the fateful date would be still remembered in memorials by Muslims for the following 450 years. The fateful date and the so-called "Balat Al Shuhada" of Toulouse would be still remembered in memorials by Muslims for the following 450 years, as opposed to the Battle of Poitiers, held as a minor battle.