 Although the Chinese forces departed once more in 1913, the First World War and the Russian Revolution isolated the now independent Tibet, reducing Western influence and interest.Ineffectual regents ruled during the 14th Dalai Lama's infancy and China began to reassert its control, a process that culminated in 1950–1951 with the Chinese invasion of Tibet by a newly-formed Communist China.The position of British Trade Agent at Gyangzê was occupied from 1904 until 1944.