Prof. Pahm describes the historical background of Lake Lanao, the Maranaos who inhabited it, how they use the lake as a security against their enemies and their socio-political and religious life. During the American occupation of the Philippines starting 1898, the Maranaos inherited the wars waged by the Spaniards against the Muslims, the Americans through their policy of attraction won over the hearts of the Maranaos only after bloody and ferocious campaigns.