In June 1970, Sâr left Vietnam and reached his K-5 base. In July he headed south; it was at this point that he began referring to himself as "Pol", a name he later lengthened to "Pol Pot". By September, he was based at a camp on the border of Kratie and Kompong Thom, where he convened a meeting of the CPK Standing Committee. Although few senior members could attend, it issued a resolution setting out the principle of "independence-mastery", the idea that Cambodia must be self-reliant and fully independent of other countries. In November, Pol Pot, Ponnary, and their entourage relocated to the K-1 base at Dângkda. His residence was set up on the northern side of the Chinit river; entry was strictly controlled. By the end of the year, Marxist forces had a presence in over half of Cambodia; the Khmer Rouge played a restricted role in this, for throughout 1971 and 1972, the majority of fighting against Lon Nol was carried out by Vietnamese or by Cambodians under Vietnamese control.