The fragile British control over Fārs was disrupted in May 1918 when Ṣawlat-al-Dawla, leading the Qashqais and other pro-German tribal forces from Kazerun, Dashti, Dashtestan and Tangestan, embarked upon a war against the British.
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The uprising of people of Tangestan prolonged nearly for 7 years in which Daliran Tangestan (the brave of Tangestan) pursued two goals: guarding Bushehr, Dashtestan and Tangestan as their habitat and preventing the foreign forces from infiltrating the country and securing the independence of the country.
The setting of this story is Davvas (also دواس) inhabitted mostly by people migrating from other parts of Bushehr province including Tangestan.