What was the significance of the Battle of Adrianople (378 CE)?

• A. Romans won a decisive victory, stabilizing the empire
• B. Visigoths defeated the Roman army, signaling the vulnerability of the Empire’s military and accelerating the decline of the Western Empire
• C. It marked the end of the Punic Wars
• D. It was a naval battle on the Baltic Sea

Answer: (B)

The main idea being tested is how a single battlefield defeat can reveal the fragility of Rome’s military system and accelerate major changes in the empire’s structure. At Adrianople in 378 CE, the Visigoths crushed the Roman army and killed Emperor Valens, a blow that showed Roman legions could be defeated in the field by “barbarian” forces inside the empire’s frontiers. This defeat shook Roman confidence and exposed serious weaknesses in frontier defense, prompting a shift in how Rome organized its military.

In the aftermath, Rome increasingly relied on Germanic groups as foederati—allied peoples who provided troops in exchange for land and subsidies—rather than relying solely on traditional Roman legions. That change weakened the Western Empire’s cohesiveness and ability to respond to threats on its own, and it helped set in motion the broader decline of Western authority that culminated in the late antique period. The battle is not about a Punic War ending, nor a naval confrontation, and it did not represent a Roman victory; it marks a turning point where Rome’s military vulnerability became publicly evident and had lasting political and military consequences.