The origins of military obligation in England pre-date the establishment of the English state in the 10th century, and can be traced to the 'common burdens' of the
Anglo-Saxon period, among which was service in the
fyrd, or army. There is evidence that such an obligation existed in the
Kingdom of Kent by the end of the 7th century,
Mercia in the 8th century and
Wessex in the 9th century, and the
Burghal Hidage of 911–919 indicates that over 27,000 men could have been raised in the defence of 30 West Saxon boroughs. In the late 10th century, areas began to be divided into '
hundreds' as units for the fyrd. The obligation to serve was placed on landholders, and the
Domesday Book indicates that individuals were expected to serve for approximately 60 days. The
Norman conquest of England in 1066 brought with it a
feudal system which also contained an element of military obligation in the form of the feudal host. This system supplemented rather than replaced the fyrd, which continued to be deployed until at least the beginning of the 12th century. The
Assize of Arms of 1181 combined the two systems by dividing the free population into four categories according to wealth and prescribing the weapons each was to maintain. The first category corresponded to the feudal host, the next two corresponded to the old fyrd and the last to a general levy. The
Statute of Winchester in 1285 introduced two more non-feudal categories to impose a general military obligation on all able-bodied males, including non-free, between the ages of 15 and 60, and updated the prescribed weaponry in the light of developments in warfare at the time. Because it was not practical to call out every man,
King Edward I introduced a system whereby local gentry were authorised to conduct
commissions of array to select those who would actually be called for military service. During the reign of
King Edward III, feudal service was recognised as increasingly obsolete, and the feudal host was formally called out in full for the last time in 1327. During the
Hundred Years' War, the king raised armies for service in France by
indenture, which contracted
magnates, under their obligation as subjects rather than feudal tenants, to supply a certain number of men for a specific amount of time in return for a set fee. Those forces allocated for the defence of England, however, were raised on the basis of the general obligation ==Sixteenth century==