The pagan Franks, who had been migrating to Gaul from the third century, with their ruling Merovingian dynasty converted to the Catholic Church on Christmas Day in 498, following the Battle of Tolbiac, when Clovis I converted and was baptised at Reims. The details of this event have been passed down by Gregory of Tours, who recorded them many years later in the sixth century. After their conversion he portrayed the Franks as fighting against Arian heretics and barbarians. However, evidence indicates that Clovis failed to cause religious disagreement between the Arian Visigoths and the Gallo-Romans and there is no indication that religion was the motivation for the wars. Many of the Frankish aristocracy followed Clovis in converting to Christianity, but the conversion of all his subjects occurred after considerable effort and in some regions over the next two centuries. The "Chronicle of St. Denis" relates that, following Clovis' conversion, a number of pagans who were unhappy rallied around Ragnachar, who had played an important role in Clovis' initial rise to power. Though the text remains unclear as to the precise pretext, Clovis had Ragnachar executed. Remaining pockets of resistance were overcome region by region, primarily due to the work of an expanding network of monasteries.