His predecessor, Gleb Svyatoslavich, escaped to his father, Svyatoslav II of Chernigov who was part of the Yaroslaviches triumvirate.
The text describes a political situation where Gleb Svyatoslavich's predecessor sought refuge with his father, Svyatoslav II of Chernigov, who was part of a powerful political alliance known as the Yaroslaviches triumvirate.