A short-lived Roman rump state in northern Gaul, ruled successively by the Roman generals Aegidius and his son Syagrius, that maintained nominal Roman authority between the Loire and Somme rivers for 25 years after the effective collapse of the Western Roman Empire.
Defeated at the Battle of Soissons (486 CE) by the Frankish king Clovis I; Syagrius fled to the Visigoths but was surrendered and executed, ending the last remnant of Roman rule in Gaul.
The leading argument that Rome's fall was a genuine catastrophe; provides essential context for why the Kingdom of Soissons survived as an isolated Roman remnant and what its end meant for Gaul.
Ammianus is the great contemporary historian of the late-4th-century Roman West, providing the primary-source backdrop to the collapse of Roman Gaul that produced the Soissons rump state.
The migration-era West that this kingdom rose from — broad context for the post-Roman transition.