In January 1904, a British expeditionary force invaded and captured Lhasa during the British expedition to Tibet. The expedition's leader, Sir Francis Younghusband negotiated the Convention Between Great Britain and Tibet with the remaining Tibetan officials after the Dalai Lama had fled to the countryside. The treaty was subsequently repudiated and was succeeded by a 1906 Anglo-Chinese treaty. All Qing troops left Lhasa after the Xinhai Lhasa turmoil in 1912.