Over the course of the medieval millennium, therefore, the status, use, arms, and tactics of Europeís foot soldiers underwent steady change. One important aspect of this change was in the way local rulers raised and organized their infantry units. Before Romeís demise and the emergence of the i rst medieval kingdoms, the Roman army dominated military matters in Europe. One reason it was so strong was that it was a national standing army in which soldiers were regularly drafted from the realmís general population. h ese men underwent intensive training and often gained years of military experience, which made them professional and highly skilled i ghters. In contrast, after Romeís fall the small kingdoms that arose upon its wreckage lacked the strong central government and massive military organization and traditions the Romans had enjoyed. So the post-Roman European kingdoms initially had no national armies. h is meant that their rulers had to turn to other means to raise soldiers when they needed them. h e most common solution to this problem in the early medieval centuries was to use the services of a temporary militia. A militia is a part-time military force made up of ordinary citizens. In a military emergency, they grab their own weapons, assemble, take part in a campaign or battle, and then return to their homes. In Saxon England, the militia, or citizen levy, was called the great Fyrd. It provided Harold with most of the troops he commanded at Hastings. After Williamís victory there and the Norman Conquest that followed, the English militia came to be known as the posse comitatus, or ďforce of the county.Ē Each unit was led by a commander called a sherif. In the early German kingdoms the citizen levy was called the Heerban and in Francia (later called France), it was the arrière-ban.