Military History of France - Early Period

Early Period

Around 390 BC, the Gallic chieftain Brennus made his own way through the Alps, defeated the Romans in the Battle of the Allia and sacked Rome for several months. The Gallic invasion left Rome weakened and encouraged several subdued Italian tribes to rebel. One by one, over the course of the next 50 years, these tribes were defeated and brought back under Roman dominion. Meanwhile, the Gauls would continue to harass the region until 345 BC, when they entered into a formal treaty with Rome. But Romans and Gauls would maintain an adversarial relationship for the next several centuries and the Gauls would remain a threat in Italia.

Around 125 BC, the south of France is conquered by the Romans who called this region Provincia Romana ("Roman Province"), which evolved into the name Provence in French. Brennus' sack of Rome was still remembered by Romans, when Julius Caesar conquered the remainder of Gaul. Initially Caesar met with little Gallic resistance : the 60 or so tribes that made up Gaul were unable to unite and defeat the Roman army, something Caesar exploited by pitting one tribe against another. In 58 BC, Caesar defeated the Germanic tribe of the Suebi, which was led by Ariovistus. The following year he conquered the Belgian Gauls after claiming that they were conspiring against Rome. The string of victories continued in a naval triumph against the Veneti in 56 BC. In 53 BC, a united Gallic resistance movement under Vercingetorix emerged for the first time. Caesar laid siege to the fortified city of Avaricum (Bourges) and broke through the defenses after 25 days, with only 800 out of the 40,000 inhabitants managing to escape. He then besieged Gergovia, Vercingetorix's home town, and suffered one of the worst defeats in his career when he had to retreat to suppress a revolt in another part of Gaul. After returning, Caesar surrounded Vercingetorix at Alesia in 52 BC. The townspeople were starved into submission and Caesar's unique defensive earthworks, protruding towards the city and away from it in order to stop a massive Gallic relief force, eventually forced Vercingetorix to surrender. The Gallic Wars were over.

Gallo-Roman culture settled over the region in the next few centuries, but as Roman power weakened in the 4th and 5th centuries, a Germanic tribe, the Franks, overran large areas that today form modern France. Under King Clovis I in the late 5th century and early 6th centuries, Frankish dominions quadrupled as they managed to defeat successive opponents for control of Gaul. In 486 the Frankish armies under Clovis triumphed over Syagrius, the last Roman official in Northern Gaul, at the Battle of Soissons. In 491 Clovis defeated Thuringians east of his territories. In 496 he overcame the Alamanni at the Battle of Tolbiac. In 507 he scored the most impressive victory in his career, prevailing at the Battle of Vouillé against the Visigoths, who were led by Alaric II, the conqueror of Spain.

Following Clovis, territorial divisions in the Frankish domain sparked intense rivalry between the western part of the kingdom, Neustria, and the eastern part, Austrasia. The two were sometimes united under one king, but from the 6th to the 8th centuries they often warred against each other. Early in the 8th century, the Franks were preoccupied with Islamic invasions across the Pyrenees and up the Rhone Valley. Two key battles during this period were the Battle of Toulouse and the Battle of Tours, both won by the Franks, and both instrumental in slowing Islamic incursions. Claims that these victories permitted the independent development of European civilization seem exaggerated, but nonetheless they were major symbolic triumphs over the "Islamic hordes."

Under Charlemagne the Franks reached the height of their power. After campaigns against Lombards, Avars, Saxons, and Basques, the resulting Carolingian Empire stretched from the Pyrenees to Central Germany, from the North Sea to the Adriatic. In 800 the Pope made Charlemagne Emperor of the West in return for protection of the Church. The Carolingian Empire was a conscious effort to recreate a central administration modeled on that of the Roman Empire, but the motivations behind military expansion differed. Charlemagne hoped to provide his nobles an incentive to fight by encouraging looting on campaign. Plunder and spoils of war were stronger temptations than imperial expansion, and several regions were invaded over and over in order to bolster the coffers of Frankish nobility. Cavalry dominated the battlefields, and while the high costs associated with equipping horses and horse-riders helped limit their numbers, Carolingian armies maintained an average size of 20,000 by recruiting infantry from imperial territories near theaters of operation. The Empire lasted from 800 to 843, when, following Frankish tradition, it was split between the sons of Louis the Pious by the Treaty of Verdun.

See also: List of Frankish and Carolingian battles and List of French wars and battles#Franks and the Carolingian Empire