Celtic Warfare was the type of warfare practiced by the various Celtic peoples and tribes, from Classical antiquity through the Migration period. No Celtic group employed a regular military as we would understand it today. Organization was varied from group to group and was usually structured according to clan groupings and social class. Endemic warfare appears to have been a regular feature and an important aspect of life in the various Celtic societies. The organizational structure of Celtic tribes and societies varied greatly from group to group. Some of these had a strict hierarchical structure and a ruling monarchy, while others exhibited representational organizational structures typical of a republic. The expansionist policies of Rome gradually brought most continental Celtic peoples under Roman rule, leading to Roman citizenship. Gallic and Brittonic cultures quickly assimilated to Roman culture, giving rise to the hybrid Gallo-Roman and Romano-British cultures of Late antiquity. Following this period, Celtic culture became mostly restricted to Insular Celtic peoples. Archaeology provides much information regarding the material culture of the Celts, but the significance of these finds in determining how the ancient Celts actually fought is the subject of much speculation. Mythological Celtic Mythology is fractured as the mythologies of most of the continental Celtic peoples, such as the Gauls, Galatians and Celtiberians, did not survive the Roman conquests. With only remnants found within Greco-Roman sources and archaeology. Most surviving Celtic mythology belongs to the Insular Celtic peoples who were able to preserve their myths and traditions with oral lore. These were committed to writing in the medieval period by Christian scribes, some time after the pre-Christian era they are supposed to depict. Irish mythology has the largest written body of myths, followed by Welsh mythology. Other surviving examples being Cornish mythology, Breton mythology and Arthurian mythology. Champion warfare was an important common aspect of Celtic Mythology, with examples in the Ulster cycle, the Fourth Branch of the Mabinogi and the Arthurian cycle. In the Táin Bó Cúailnge, chiefly the story of Ulaid hero Cú Chulainn, he defeats an entire army from Connacht one by one in single combat. This story describes combat centered on the use of the spear (gae) and javelin (gá-ín) with no mention of helmets or metal armor, which is consistent and in keeping with archaeological evidence. Chariots also played an important role in the warfare and culture of various Celtic groups, with Chariot burials being