The economic and social form of government. The population was classified as lords, men of arms, and serfs. This system originated in northern or Celtic nations who took over Europe on the decline of the Roman Empire. A conquering general allotted large districts of land to the superior officers of the army, who made allotments to the soldiers. These allotments were the feuds which were given out as rewards or stipends for faithful services to be rendered by the donees in peace and in war; and in the event of a failure to render such services, the land reverted to him who granted it.