It was not until the year 451 that the Huns commenced the siege of Orleans; and during their campaign in Eastern Gaul, the Roman general Aetius had strenuously exerted himself in collecting and organizing such an army as might, when united to the soldiery of the Visigoths, be fit to face the Huns in the field. He enlisted every subject of the Roman empire whom patriotism, courage, or compulsion could collect beneath the standards; and round these troops, which assumed the once proud title of the legions of Rome, he arrayed the large forces of barbaric auxiliaries whom pay, persuasion, or the general hate and dread of the Huns, brought to the camp of the last of the Roman generals. King Theodoric exerted himself with equal energy, Orleans resisted her besiegers bravely as in after times. The passage of the Loire was skilfully defended against the Huns; and Aetius and Theodoric, after much manoeuvring and difficulty, effected a junction of their armies to the south of that important river. On the advance of the allies upon Orleans, Attila instantly broke up the siege of that city, and retreated towards the Marne. He did not choose to risk a decisive battle with only the central corps of his army against the combined power of his enemies; and he therefore fell back upon his base of operations; calling in his wings from Arras and Besancon, and concentrating the whole of the Hunnish forces on the vast plains of Chalons-sur-Marne. A glance at the map will show how scientifically this place was chosen by the Hunnish general, as the point for his scattered forces to converge upon; and the nature of the ground was eminently favourable for the operations of cavalry, the arm in which Attila's strength peculiarly lay. It was during the retreat from Orleans that a Christian is reported to have approached the Hunnish king, and said to him, "Thou art the Scourge of God for the chastisement of Christians." Attila instantly assumed this new title of terror, which thenceforth became the appellation by which he was most widely and most fearfully known.