 Complete the following phrase:  Fleeing before the advance of the Huns, the Vandals, Suebi, and Alans launched an attack across the frozen Rhine near Mainz; on 31 December 406, the frontier gave way and these tribes surged into Roman Gaul. There soon followed the Burgundians and bands of the Alamanni. In the fit of anti-barbarian hysteria which followed, the Western Roman Emperor Honorius had Stilicho summarily beheaded 408. Stilicho submitted his neck, with a firmness not unworthy of the last of the Roman generals, wrote Gibbon. Honorius was left with only worthless courtiers to advise him. In 410, the Visigoths led by Alaric I 