 The Primary Chronicle 's brief account of Oleg 's life contrasts with other early sources , specifically the Novgorod First Chronicle , which states that Oleg was not related to Rurik , and was rather a Scandinavian client @-@ prince who served as Igor 's army commander . The Novgorod First Chronicle does not give the date of the commencement of Oleg 's reign , but dates his death to 922 rather than 912 . 
