The Krahn are an ethnic group of Liberia and Ivory Coast. This group belongs to the Kru language family and its people are sometimes referred to as the Wee, Guéré, Sapo, or Wobe. It is likely that Western contact with the Kru language is the primary reason for the development of these different names. The Krahn arrived in an area of Liberia previously known as the "Grain Coast" as part of early 16th-century migrations from the northeast and what is now Ivory Coast. This migration occurred due to pressure on local populations resulting from the emigration of ethnic groups from western Sudan after the decline of medieval empires, as well as an increase in regional wars. At the time, the African slave trade was becoming more prominent within Liberia. Some Kru subgroups were sold into slavery by their neighbours, but it was more common for the Krahn and other coastal peoples in Liberia to serve as local traders, brokering deals within the Western slave market. Many Kru committed suicide rather than face enslavement. During the late 1970s, Liberia faced heated civil unrest in which opposition to the Americo-Liberian and Tolbert government led to a military coup, organized in part by indigenous tribal members. The tension culminated in coup on April 12, 1980, in which Master Sergeant Samuel Kanyon Doe, a member of the Krahn ethnic group and leader of the group involved in the coup, seized power, becoming Liberia's first native leader and head of state. With a Krahn leader serving as a key political figure, the once disparaged Krahn were now more prominently included in Liberia's governing body. This rise in status led many Krahn speakers to move to the capital, Monrovia. Doe began showing favoritism to the Krahn, particularly to those from his own tribal group. These measures included appointing members of the Krahn's ethnic kin from Ivory Coast, known more commonly as the Wee, to the Executive Mansion Guard, as well as taking steps to prevent people of other ethnicities from reaching key government positions.