At the Frigidus River in 394 A.D., Theodosius I defeated which two usurpers?

The conflict at the Frigidus River in 394 A.D. saw Theodosius I gain a crucial victory over two significant figures at that time: Arbogast and Eugenius. Arbogast was a general who had become the chief military leader of the western Roman Empire, appointing Eugenius as a puppet emperor. This battle was pivotal because it not only solidified Theodosius's power but also marked the final major conflict in the struggle for control of the Western Roman Empire.

The victory over these usurpers allowed Theodosius to strengthen his position and promote the unity of the Roman Empire under his rule, especially after having previously declared Christianity as the state religion. The defeat of Arbogast and Eugenius symbolizes the end of significant challenges to Theodosius’s authority and the consolidation of imperial power during a tumultuous period in Roman history.