Barbarian invasions into the Roman Empire of the 3rd century in the context of "Marcomanni"

The Crisis of the Third Century, also known as the Military Anarchy or the Imperial Crisis, was a period in Roman history during which the Roman Empire nearly collapsed under the combined pressure of repeated foreign invasions, civil wars and economic disintegration. At the height of the crisis, the Roman state split into three distinct and competing polities. The period is usually dated between the death of Severus Alexander (235) and accession of Diocletian (284).

The crisis began in 235 with the assassination of Emperor Severus Alexander by his own troops. During the following years, the empire saw barbarian invasions and migrations into Roman territory, civil wars, peasant rebellions and political instability, with multiple usurpers competing for power. This led to the debasement of currency and a breakdown in both trade networks and economic productivity, with the Plague of Cyprian contributing to the disorder. Roman armies became more reliant over time on the growing influence of the barbarian mercenaries known as foederati. Roman commanders in the field, although nominally loyal to the state, became increasingly independent of Rome's central authority.

The barbarian kingdoms were states founded by various non-Roman, primarily Germanic, peoples in Western Europe and North Africa following the collapse of the Western Roman Empire in the 5th century CE. The barbarian kingdoms were the principal governments in Western Europe in the Early Middle Ages. The time of the barbarian kingdoms is considered to have come to an end with Charlemagne's coronation as emperor in 800, though a handful of small Anglo-Saxon kingdoms persisted until being unified by Alfred the Great in 886.

The formation of the barbarian kingdoms was a complicated, gradual, and largely unintentional process. Their origin can be traced to the Roman state failing to handle barbarian migrants on the imperial borders, which led to both invasions and invitations into imperial territory from the 3rd century onwards. Despite an increasing influx of barbarians, the Romans simultaneously denied them the ability to properly integrate into the imperial framework. Barbarian rulers were at first local warlords and client kings without firm connections to any territory. Their influence only increased as Roman emperors and usurpers began to use them as pawns in civil wars. The barbarian realms only transitioned into proper territorial kingdoms after the collapse of effective Western Roman central authority.

Astorga (Spanish: [asˈtoɾɣa] , Estorga in the Leonese dialect of Maragatería) is a municipality and city in Spain, located in the Province of León, within the autonomous community of Castile and León. Situated at the transition between the Páramo Leonés and the Montes de León, it serves as a central hub for the regions of Maragatería, La Cepeda, and the Ribera del Órbigo. The city is the seat of one of Spain's oldest and most extensive dioceses, with jurisdiction over half of the province of León and parts of the provinces of Ourense and Zamora. It is also the head of the judicial district number 5 of the province of León.

Founded as a Roman military camp for the Legio X Gemina in the late 1st century BC, it soon transitioned into a civilian settlement known as Asturica Augusta and became the capital of the Conventus Asturum. It developed as a key communication hub in northwestern Iberia and enjoyed prosperity during the first two centuries of the Common Era due to gold mining, earning the description vrbs magnifica from Pliny the Elder. By the mid-3rd century, it likely became an episcopal see, with Basílides as its first bishop. Following the barbarian invasions, it was part of the Kingdom of the Suebi and was captured by Muslim forces under Tariq in 714, though it was reconquered by the Asturian monarchy later that century. In the late 10th century, it faced repeated Muslim assaults led by Almanzor.