The Late Roman Empire was a period of profound transformation. From the Crisis of the Third Century to the fall of Rome, the empire faced political instability, economic turmoil, and barbarian invasions. Key events like Constantine's reign and the Battle of Adrianople shaped its trajectory. Reforms by Diocletian and Constantine reshaped governance, while Christianity's rise altered the religious landscape. The empire's division into East and West had lasting impacts. Military challenges, economic struggles, and social changes ultimately led to the Western Empire's collapse in 476 AD.