decays > downfalls; deaths
6 Their swords and spears were broken, and hauberks rent;
hauberk > {Chain-mail tunic; chain-mail covering for neck and shoulders} rent > torn
7 And their proud garlands of triumphant bays
bays > {Leaves or sprigs of the laurel, used to make a wreath for conquerors}
8 Trodden in dust with fury insolent,
insolent > immoderate; overbearing; or: exultant (SUS: cf. CC 622)
9 To show the victor's might and merciless intent.
intent > frame of mind; intention
311.53