After World War I when the British took over Tanganyika they further accelerated the campaign to grow coffee in the region and introduced various land reform laws. The British also continued to receive resistance from the Haya people and coffee production in the north-west region remained stagnant. However, the Chagga tribe who had no history of cultivating the crop continued to produce the crop and in 1925 exported 6000 tonnes worth $1.2 million. With the expansion of the railway into the country the British expanded their network of coffee farmers. In 1925 the Kilimanjaro Native Planters' Association (KNPA) was formed and it was the first of many coffee cooperatives formed in the country, formed to help farmers obtain a better price.