What did the Emperor Valens do?

Emperor Valens, who ruled from 364 to 378 AD, is best known for his military campaigns and his role in the Arian controversy within Christianity. He faced significant challenges from the Goths, culminating in the disastrous Battle of Adrianople in 378, where he was defeated and killed. Valens' reign is often marked by his attempts to maintain the Eastern Roman Empire's stability amid external threats and internal strife regarding religious doctrine. His failure to effectively address these issues contributed to the empire's vulnerabilities.