The German tribes who remained conquerors were composed of the different groups of Franks, Saxons, Thuringians, Bajuvarians, Burgundians, etc., each composed of families aggregated into communal hordes with an elected Duke (_dux_, _Herzog_, _Graf_, _Fürst_), organized for war, each in itself a socialistic and economic organization known as _Mark_, owning a territory in common, the members or _Markgenossen_ forming a republic. Outside of house, yard and garden, there was no private property; the land surrounding the settlement, known as _Allmende_, (commons) was owned in common, but assigned in parcels to each family for field use, the assignment first changing from year to year, then becoming fixed. The outlying woods, known as the _Marca_ or _Grenzwald_, forming debatable ground with the neighboring tribes, were used in common for hunting, pasturing, fattening of hogs by the oak mast, and for other such purposes, rather than for the wood of which little was needed. In return for the assignment of the fields, the free men, who alone were fully recognized citizens of the community, had to fulfil the duties of citizens and especially of war service. Only gradually, by partition, immigration and uneven numerical development, was the original Mark or differentiation into family associations destroyed and a more heterogeneous association of neighbors substituted. At the same time, inequality of ownership arose especially from the fact that those who owned a larger number of slaves (the conquered race) had the advantage in being able to clear and cultivate more readily new and rough forest ground. Those without slaves would seek assistance from those more favored, exchanging for rent or service their rights to the use of land; out of this relationship a certain vassalage and inequality of political rights developed. Under the influence of Roman doctrine, a new aspect regarding newly conquered territory gained recognition, by which the Dukes as representatives of the community laid claim to all unseated or unappropriated land; they then distributed to their followers or donated to the newly established church portions of this land, so that by the year 900 A.D., a complete change in property relations had been effected. By that time the large baronial estates of private owners had come into existence which were of such great significance in the economic history of the Middle Ages, changing considerably the status of the free men, and changing the free mark societies into communities under the dominion of the barons.