After the Revolution of 1911,remove China's sovereignty over Britain,the Britain intensified invasion on Tibet and interfered with the disputes between Xikang and Tibet.For example,politically,it was in favor of Tibet to capture partial areas of Xikang,Qinghai and Tibet.Diplomatically,it had a hand in the disputes which was dealt with by the central government of the Republic of China.Militarily,it implementer a policy called Armed Tibet,what's worse is that it helped Tibet to augment and drill the military and sold a great deal of arms to Ti...