The Emirate of Trarza was a precolonial state in what is today southwest Mauritania. It has survived as a traditional confederation of semi-nomadic peoples to the present day. Its name is shared with the modern Region of Trarza. The population, a mixture of Berber tribes, had been there for a long time before being conquered in the 11th century by Hassaniya Arabic speakers from the north. Europeans later called these people Moors/Maures, and thus have titled this group "the Trarza Moors".