In 369, Valens finally penetrated deep into the Gothic territory, winning a series of skirmishes with Greuthungi, who are mentioned here for the first time in a classical record. Athanaric who was, in this passage, described by Ammianus as their most powerful judge ""iudicem potentissimum"" (implying he was a leader of the Greuthingi) was compelled to flee, and then make a peace agreement in the middle of the Danube, promising to never set foot on Roman soil. In later parts of his text however, Ammianus describes Athanaric as a judge ("iudex") of the Tervingi, who was attacked by Greuthungi who had joined the Huns.