During the period of the British Raj from the fall of the Durrani Empire in 1823 , four princely states were recognised and reinforced in Balochistan : Makran , Kharan , Las Bela and Kalat . In 1876 , Robert Sandeman negotiated the Treaty of Kalat , which brought the Khan 's territories , including Kharan , Makran , and Las Bela , under British protection even though they remained independent princely states . After the Second Afghan War was ended by the Treaty of Gandamak in May 1879 , the Afghan Emir ceded the districts of Quetta , Pishin , Harnai , Sibi and Thal Chotiali to British control . On 1 April 1883 , the British took control of the Bolan Pass , south-east of Quetta , from the Khan of Kalat . In 1887 , small additional areas of Balochistan were declared British territory . In 1893 , Sir Mortimer Durand negotiated an agreement with the Amir of Afghanistan , Abdur Rahman Khan , to fix the Durand Line running from Chitral to Balochistan as the boundary between the Emirate of Afghanistan and British-controlled areas . Two devastating earthquakes occurred in Balochistan during British colonial rule : the 1935 Quetta earthquake , which devastated Quetta , and the 1945 Balochistan earthquake with its epicentre in the Makran region
1945 Balochistan earthquake
1945 Balochistan earthquake
Balochistan, Pakistan