In 376 a large part of the Tervingi were allowed to cross the Lower Danube entering the Roman Empire with weapons, under the command of Fritigern, who had split from Athanaric. As tensions rose, Alatheus and Saphrax also crossed with Greuthingi and their king Videricus, despite their requests for permission having been rejected. Athanaric, who was apparently with them before they crossed, moved instead to a mountainous and forested region called Caucalanda, forcing Sarmatians out of the area. Alans and Huns also crossed in 377. The displacement of the Goths into the Balkans peninsula led to the Gothic War of 376–382 during which the Greuthungi of Alatheus and Saphrax were allied with the Tervingi of Fritigern. Greuthungi cavalry contributed to the decisive Gothic victory at the Battle of Adrianople of 9 August 378. In 382 there a more lasting settlement agreement was made for the large number of Goths to settle peacefully in the Balkans, and contribute to the Roman military. Unfortunately, the details of this agreement are now unclear.