98：初，段兰卒于令支，段龛代领其众，因石氏之乱，拥部落南徙。秋，七月，龛引兵东据广固，自称齐王。 Zizhi Tongjian, Chapter 99：段龛请以青州内附；二月，戊寅，以龛为镇北将军。封齐公。 Zizhi Tongjian, Chapter 99：镇北将军段龛与燕主俊书，抗中表之仪，非其称帝。俊怒，十一月，以太原王恪为大都督、抚军将军，阳鹜副之，以击龛。...

to correct them. In 525, in the midst of Six Frontier Towns rebellions (六镇之乱) against Northern Wei's rule, Gao and his associates joined one of the major...