After winning a battle, Clovis I became the first Frankish king to convert to Christianity.
Charles Martel and his troops took the high forrested ground of the hill and attack Ar Rahman's troops from there. In the Battle of Tours, Martel defeated the Muslims, preventing a Muslim invasion and earning himself the moniker "The Hammer."
Pepin the Short was the first Frankish king to be annointed by the Pope. He protected the church forever after this moment.
Charlemagne was a great conqueror, and united nearly all of Western Europe. As he attacked, he forced the citizens of the conquered areas to convert to Christianity. Otherwise, they would be killed.
While Charlemagne was the king, his nephew, Roland, was a rear guard warrior. He was immortalized in history when he attacked the Basques in Spain. The Song of Roland was composed for this legendary battle.
Louis the Pious was a very godly and devoted Frankish king, and people expected him to be a great ruler. However, he greatly weakened the empire by splitting it between his three sons.