conflict that destroyed both Kilwa and Mombasa port towns of Shirazi rulers. The Portuguese military power and direct trading with India in the beginning, followed by other European powers, led to a rapid decline of the Shirazi towns which thrived and depended primarily on the trade. In parallel to European competition, non-Swahili-speaking Bantu groups began attacking Shirazi towns in the sixteenth and seventeenth centuries. Thus, the Shirazi sultanates faced war from sea and land, leading to a rapid loss of power and trading facilities. The Omani Arabs re-asserted their military in the seventeenth century, and they defeated the Portuguese in 1698, at Mombasa. The Portuguese agreed to cede this part of Africa, and a fresh migration of Arabs from Oman and Yemen into the Shirazi people settlements followed. Contemporary demography Some towns and islands have had a much larger concentration of Shirazi people. For example, in 1948, about 56% of the Zanzibar population reported Shirazi ancestry of Persian origins. In local elections, the Shirazi voted for whichever party was politically expedient, whether the ethnic minority-supported Zanzibar Nationalist Party or the mainland Tanzania-associated Afro-Shirazi Party. Genetic analysis by Msadie et al. (2010) indicates that the most common paternal lineages among the contemporary Comorian population, which includes Shirazi people, are clades that are frequent in sub-Saharan Africa (E1b1a1-M2 (41%) and E2-M90 (14%)). The samples also contain some northern Y chromosomes, indicating possible paternal ancestry from South Iran (E1b1b-V22, E1b1b-M123, F*(xF2, GHIJK), G2a, I, J1, J2, L1, Q1a3, R1*, R1a*, R1a1 and R2 (29.7%)), and Southeast Asia (O1 (6%)). The Comorians also predominantly bear mitochondrial haplogroups linked with sub-Saharan East African populations in East and South East Africa (L0, L1, L2 and L3′4(xMN) (84.7%)), with the remaining maternal clades associated with Southeast Asia (B4a1a1-PM, F3b and M7c1c (10.6%) and M(xD, E, M1, M2, M7) (4%)) but no Middle Eastern lineages. According to Msadie et al., given that there are no common Middle Eastern maternal haplogroups on the Comoros, there is "striking evidence for male-biased gene flow from the Middle East to the Comoros", which is "entirely consistent with male-dominated trade and religious proselytisation being the forces that drove the Middle Eastern gene flow to the Comoros". Religion Today, most Swahili follow the Shafi'i branch of Sunni Islam. Language Like most of the Swahili people, the Shirazi speak local dialects of the Swahili language as a mother tongue. It belongs to the Bantu branch