The Duchy of Gascony, then known as "Wasconia", was originally a Frankish march formed to hold sway over the Basques (Vascones). However, the Duchy went through different periods, from its early years with its distinctively Basque element to the merger in personal union with the Duchy of Aquitaine to the later period as a dependency of the Plantagenet kings of England. In the Hundred Years' War, Charles V of France conquered most of Gascony by 1380, and under Charles VII of France it was incorporated into the kingdom of France in its entirety in 1453. The corresponding portion within Spain became part of the Basque Kingdom of Navarre. Gascony was the core territory of Roman Gallia Aquitania. This province, by the 2nd century, was extended to include much of western Roman Gaul, as far north as the Loire. Thus, the name of the "Aquitani" came to be transferred to the territory of central-western France later known as the Duchy of Aquitaine. In 293, Diocletian re-created the original province of Caesar's Aquitania under the name of Novempopulania or "Aquitania Tertia". The "Vascones" were a people of the southwestern Pyrenees in the Roman period, but by the end of the 6th century, the Vascones defined a confederacy of native tribes with similar language and traditions on both sides of the Pyrenees who had not been culturally Romanized. Around 580, both the Visigothic kingdom and the kingdom of the Franks launched major campaigns against the Basques. In 587 Basques are cited as raiding the plains of Aquitaine, maybe to the west of Toulouse. Chilperic I sent his duke Bladastes stationed in Toulouse, but was defeated. After taking the throne, Leovigild launched a series of military campaigns around the Iberian Peninsula, taking control from the Basques (""partes Vasconiae"") in the upper reaches of the Ebro (present-day Álava, possibly up to the north of Castile), and founded a fortress called Victoriacum (dubiously Vitoria-Gasteiz, possibly Iruña-Veleia). This military push from a stronger centralized authority in Toledo placed more pressure on the Basques to get off the Ebro rich farmland than those already stretching all the way to the Garonne.