Which battle is associated with the Visigoths' victory that exposed the empire’s military weakness?

• A. The Battle of Cannae
• B. The Battle of Actium
• C. The Battle of Adrianople
• D. The Battle of Teutoburg Forest

Answer: (C)

The question tests recognizing a turning moment when a Visigoth victory made clear the Roman military’s vulnerabilities. The Battle of Adrianople, fought in 378 CE near the city of Adrianople, is that moment. In this clash the Visigoths defeated the Eastern Roman army and killed Emperor Valens, revealing deep weaknesses in how Rome conducted war on its frontiers.

Several factors explain why this battle exposed Rome’s weaknesses. The Romans relied heavily on heavy infantry legions and rigid formations that struggled against mobile Gothic forces, which could coordinate infantry with effective cavalry and harassing tactics. The empire was also dealing with internal stresses: difficulties integrating foederati (barbarian troops bound by treaties) into a cohesive command, and leadership decisions that left the Roman army understrength or underprepared on the field. Valens went into battle without waiting for potential reinforcements, and the resulting rout showed that the traditional Roman field army could be outmaneuvered and outmatched by a well-led barbarian confederation.

This moment stands out because it directly involves the Visigoths and demonstrates a clear military defeat that signaled broader weaknesses in Roman military organization and frontier strategy, contributing to the long-term transformation of Roman warfare. The other battles listed involve different peoples or contexts and do not illustrate this specific turning point with the Visigoths.