The commoners, who had been labouring on the cotton estates of the chiefs before World War I, did not remain servile. As time passed, they bought small parcels of land from their erstwhile landlords. This land fragmentation was aided by the British, who in 1927 forced the chiefs to limit severely the rents and obligatory labour they could demand from their tenants. Thus the oligarchy of landed chiefs who had emerged with the Uganda Agreement of 1900 declined in importance, and agricultural production shifted to independent smallholders, who grew cotton, and later coffee, for the export market.