Who were the 3 main threats to roman security?

The three main threats to Roman security were external invasions, internal political instability, and economic challenges. External invasions came from various groups, including Germanic tribes, Huns, and Persians, who challenged Rome's borders. Internally, political instability was fueled by power struggles, civil wars, and corruption, undermining the effectiveness of governance. Economically, issues such as inflation, reliance on slave labor, and resource depletion weakened the empire's stability and military readiness.