 As the 5th century progressed, many of the Empire's original borders had been either wholly or partially denuded of troops to support the central field army.In 395, the Western Roman Empire had several regional field armies in Italy, Illyricum, Gallia, Britannia and Africa, and about twelve border armies.By about 430, two more field armies were established in Hispania and Tingitania but the central government had lost control of Britannia as well as much of Gaul, Hispania, and Africa.