Libius Severus was declared emperor of the Western Roman Empire, a position that held little real power in the grand scheme of imperial politics. The true authority was firmly under the control of Ricimer, who had risen to prominence as the magister militum. This development occurred during a time of instability for the Western Roman Empire, which was beset by internal divisions and external threats, including invasions from various barbarian tribes. Severus's ascension was less about his legitimacy as a ruler and more a reflection of Ricimer's military might and political maneuvering.

Ricimer, a man of barbarian descent who played a pivotal role in the politics of the Western Roman Empire, strategically positioned Libius Severus to serve his interests. Ricimer's power was rooted in his control of the army, and by selecting Severus, he aimed to consolidate his influence within the imperial structure without directly claiming the throne himself. This act highlighted the shifting dynamics of authority during this tumultuous period, where military leaders often dictated the terms of governance. Moreover, Ricimer's ultimate goal was to stabilize the empire through a façade of legitimate rule while carefully managing the competing factions within the court.

The independence of military leaders like Ricimer was a key factor in the declining power of the Western Roman Empire. Ultimately, Libius Severus’s reign was emblematic of the broader crisis engulfing the empire, as the once-mighty institution continued to fragment under pressure. As Severus ruled, he operated within the limiting confines set by Ricimer, illustrating the complex interplay of politics, power, and military influence that defined this era. Severus's short reign was overshadowed by Ricimer's dominance, showcasing the emerging reality where emperors were increasingly subject to the whims of their military commanders.