Traditions known collectively as the Shungwaya myth describe a series of migrations of Bantu peoples dating to the 12th-17th centuries from a region to the north of the Tana River. These Bantu migrants were held to have been speakers of Sabaki Bantu languages. Other Bantu ethnic groups, smaller in number, are also suggested to have been part of the migration. From Shungwaya, the Mount Kenya Bantu (Kamba, Kikuyu, Meru, Embu, and Mbeere) are then proposed to have broke away and migrated from there some time before the Oromo onslaught. Shungwaya appears to have had its heyday as a Bantu settlement area between perhaps the 12th and the 15th centuries, after which it was subjected to a full-scale invasion of Cushitic-speaking Oromo peoples from the Horn of Africa. From the whole corpus of these traditions, it has been argued that Shungwaya comprised a large, multi-ethnic community.