From Anglo Saxon England, by Sir Frank Stenton, ISBN 0-19-282237-3, page 12:
It is possible that the stream of Saxon invaders was diverted from Gaul to Britain by the extension of the Frankish power along the south coast of the Channel in the reign of Clovis. After the defeat of Syagrius in 486, the Franks were definitely the masters in northern Gaul, and there was no opportunity for the settlement of other Germanic peoples.

From the book "The Birth of France: Warriors, Bishops and Long-Haired Kings" by Katharine Scherman, 1987, ISBN 0-394-56089-2, page 5:
The Franks, by the time they had become the acknowledged masters of most of Roman Gaul, had little resemblance to their tribal forebears for whom battle was the chief purpose of a man's life, and who chose their leaders solely for their skill and courage in combat. By the 6th century, the onetime tribal chieftains had to deal with matters of peace instead of contention. Their problems were those of a settled agricultural population. Their mentors were the lords of a church whose ideological keystone-in contrast to that of the old German wielder of thunderbolts-was love for one's brother. The Frankish leaders, originally elected by their peers only for the duration of a specific fight or raid, had become hereditary monarchs with absolute personal power. These long-haired kings of the Merovingian dynasty governed an area considerable larger than present day France. For a few generations the Merovingian royal line was the most important political fact of Western Europe.
page 65:
184 years after the Battle of the Milvian Bridge, when Emperor Constantine converted to Christianity, Clovis, king of some of the Franks but not yet all of them, entreated the support of Constantine's God during a battle on the outcome of which his future depended. As a result, he, too, became a Christian. And the resultant partnership between the Franks and the Catholic Church was the decisive factor in the ascendancy of the Frankish kingdoms under the Merovingians and later under Charlemagne.

Clovis I
Merovingian king, who succeeded his father, Childeric (481), as king of the Franks. He overthrew the Gallo-Romans, and took possession of the whole country between the Somme and the Loire by 496. In 493 he married (St) Clotilde, and was converted to Christianity along with several thousand warriors after routing the Alemanni. In 507, he defeated the Visigoth, Alaric II, captured Bordeaux and Toulouse, but was checked at Arles by the Ostrogoth, Theodoric. He then took up residence in Paris.

Clovis had established the Merovingian dynasty within a unified kingdom, but his sons and grandsons proceeded to break up the realm like any other inherited property.189

The alliance between the royal house and the church buttressed the power of the Merovingian monarchy. Their partnership dated from the fifth century. In an age when other barbarian princes in the west adhered to heretical Arian beliefs, the pagan Clovis opted for catholic Christianity. He did not suspect that his choice would have weighty consequences for the history of his lineage and kingdom. Long before the Carolingians chose to assert the title authoritatively, the Merovingian king called himself the 'elect of God' and considered the bishops as his foremost supporters.189