The South African interior, roughly equivalent to the Highveld on the southern continental plateau, was in the 19th century a stage of numerous players and groups, acting in concert and in conflict with one another, as often dissolving as taking on board new members. The fortunes of Highveld inhabitants, occupiers, and passers-by fluctuated without periods of calm, and turned advantages to few. It was therefore not uncommon for the human flotsam and jetsam created by raiding, battles, and migrations, aggravated by drought and famine, to be subordinated by the survivors and forced to serve those with whom they had no prior allegiance or knowledge. Slavery in the interior was largely a by-product of staking out territory. Rather than generate slaves for sale in an external market, slavery on the Highveld was fed by the political impulse to aggregate followers and servants. An internal exchange emerged in some areas, and traders made a few transactions with coastal exporters, but the general pattern of enslavement was acquisition by raiding and distribution among raiders. The majority taken were youngsters and, to a lesser degree, women. As a rule, the menfolk were killed.