into what is now Namibia during the mid-18th century. The Herero seized vast swaths of the arable upper plateaus which were ideal for cattle grazing. Agricultural duties, which were minimal, were assigned to enslaved Khoisan and Bushmen. Over the rest of the 18th century, the Herero slowly drove the Khoisan into the dry, rugged hills to the south and east. The Hereros were a pastoral people whose entire way of life centred on their cattle. The Herero language, while limited in its vocabulary for most areas, contains more than a thousand words for the colours and markings of cattle. The Hereros were content to live in peace as long as their cattle were safe and well-pastured, but became formidable warriors when their cattle were threatened. According to Robert Gaudi, "The newcomers, much taller and more fiercely warlike than the indigenous Khoisan people, were possessed of the fierceness that comes from basing one's way of life on a single source: everything they valued, all wealth and personal happiness, had to do with cattle. Regarding the care and protection of their herds, the Herero showed themselves utterly merciless, and far more 'savage' than the Khoisan had ever been. Because of their dominant ways and elegant bearing, the few Europeans who encountered Herero tribesmen in the early days regarded them as the region's 'natural aristocrats. By the time of the Scramble for Africa, the area which was occupied by the Herero was known as Damaraland. The Nama were pastorals and traders and lived to the south of the Herero. In 1883, Adolf Lüderitz, a German merchant, purchased a stretch of coast near Lüderitz Bay (Angra Pequena) from the reigning chief. The terms of the purchase were fraudulent, but the German government nonetheless established a protectorate over it. At that time, it was the only overseas German territory deemed suitable for European settlement. Chief of the neighbouring Herero, Maharero rose to power by uniting all the Herero. Faced with repeated attacks by the Khowesin, a clan of the Khoekhoe under Hendrik Witbooi, he signed a protection treaty on 21 October 1885 with Imperial Germany's colonial governor Heinrich Ernst Göring (father of World War I flying ace and World War II convicted war criminal Hermann Göring) but did not cede the land of the Herero. This treaty was renounced in 1888 due to lack of German support against Witbooi but it was reinstated in 1890.