On 3 January 1961 Angolan peasants in the region of Baixa de Cassanje, Malanje, boycotted the Cotonang Company's cotton fields where they worked, demanding better working conditions and higher wages. Cotonang, a company owned by European investors, used native African labor to produce an annual cotton crop for export abroad. The uprising, later to become known as the Baixa de Cassanje revolt, was led by two previously unknown Angolans, António Mariano and Kulu-Xingu. During the protests, African workers burned their identification cards and attacked Portuguese traders. The Portuguese Air Force responded to the rebellion by bombing twenty villages in the area, allegedly using napalm in an attack that resulted in some 400 indigenous Angolan deaths.