Kagera include Kyamukuma, who is a last chief in Misenye (currently Missenyi District). Other chiefs include Rumanyika of Karagwe, Ruhinda, Kahigi and other inferior chiefs. Kahigi is among the chiefs who waived their territories by collaborating with German colonialists. Cultural tours are available for tourists visiting Kagera and can be accessed from the region's capital of Bukoba. These tours include visits to the region's national parks/nature reserves etc. During German rule Dr. M. Zupitza, then serving as the local medical officer, encountered the plague outbreak in Kiziba (1897–1898). In cooperation with Dr. Robert Koch, he confirmed that the cause was the same bacteria as the outbreak in Bombay. When authority was transferred to the British who supplanted the Germans, Kagera was open to Lutheran missionary activity. Other Christian denominations including the Roman Catholic church later arrived. Their legacy is seen in the many churches in the region. The attempted annexation of Kagera by Uganda in 1979 triggered the Uganda–Tanzania War. Economy Agriculture is the main economic activity in the region. The primary crops farmed in the Kagera Region are pulses. Cereals were the most often planted crop, with 153,993 hectares (42.8% of the total area planted with annuals), followed by root and tubers with 64,261 ha (17.8%), oil seeds with 10,416 ha (2.9%), cash crops with 7,737 ha (2.1%), and fruits and vegetables with 3,558 ha (1.0%). The majority of annual cash crops were cotton. Cereal crop output in the area is dominated by maize. 302,529 households in the Kagera Region raised maize during the brief wet season, making up 93.8% of all households that raised crops during that time. Food crop sales accounted for 54.0% of smallholder households' total cash income in the Kagera Region, with cash crop sales (18.9%), other sporadic income (8.7%), fishing (4.3%), and wages/salaries (4.3%) following. Petty businesses were the primary source of income for only 3.4% of smallholder households, followed by the sale of livestock (2.5%), cash remittances (2.0%), sales of forest products (0.7%), and sales of animal products (0.6%). Kagera is also one of the largest coffee producers in the country. Muleba (9,968 ha, 26%), Karagwe (8,660 ha, 23%), Ngara (3,600 ha, 10%), Biharamulo (454 ha, 1%), and Bukoba Urban (373 ha, 1%) were the other coffee-producing areas in the area, with Bukoba Rural having the highest area (14,704 ha, 39%). (Map 3.33). However, Ngara (1.23 ha) had the greatest average amount of