As a result of massive popular unrest , Ghavaam was forced into resignation on July 21st , 1952 , and Dr. Mossadegh became Prime Minister again . about a month after this development the joint proposal of “ Churchill and Truman “ was put forward for the resolution of the oil problem ( 27th August 1952 ) . This proposal was not accepted either , because it was in violation of the principle of nationalization . To counter the British spies’ moves that had launched extensive operations under diplomatic cover , to undermine the government , Mossadegh declared the interruption of all political ties with Britain.