Early in 1929, the Afghan Civil War saw the Afghan leader King Amanullah lose power to the Saqqawists under Habibullāh Kalakāni. Kalakani's rule, however, only lasted nine months. Nadir Shah replaced him in October, starting a line of monarchs which would last 40 years. In India, a general strike in Bombay continued throughout the year despite efforts by the British. On December 29, the All India Congress in Lahore declared Indian independence from Britain, something it had threatened to do if Britain did not grant India dominion status. China and Russia engaged in a minor conflict after China seized full control of the Manchurian Chinese Eastern Railway. Russia counterattacked and took the cities of Hailar and Manchouli after issuing an ultimatum demanding joint control of the railway to be reinstated. The Chinese agreed to the terms on November 26. The Japanese would later see this defeat as a sign of Chinese weakness, leading to their taking control of Manchuria. The Far East began to experience economic problems late in the year as the effects of the Great Depression began to spread. Southeast Asia was especially hard hit as its exports (spice, rubber, and other commodities) were more sensitive to economic problems. In the Pacific, on December 28 – "Black Saturday" in Samoa – New Zealand colonial police killed 11 unarmed demonstrators, an event which led the Mau movement to demand independence for Samoa.