Germans by their peculiar mode of dressing their long hair, which they gathered into a rude knot on the crown of the head; and they delighted in an ornament that showed their ranks more lofty and terrible in the eyes of the enemy. Jealous as the Germans were of military renown, they all confessed the superior valor of the Suevi; and the tribes of the Usipetes and Tencteri, who, with a vast army, encountered the dictator Cæsar, declared that they esteemed it not a disgrace to have fled before a people to whose arms the immortal gods themselves were unequal.

In the reign of the emperor Caracalla, an innumerable swarm of Suevi appeared on the banks of the Mein, and in the neighborhood of the Roman provinces, in quest either of food, of plunder, or of glory. The hasty army of volunteers gradually coalesced into a great and permanent nation, and as it was composed from so many different tribes, assumed the name of Alemanni, * or Allmen; to denote at once their various lineage and their common bravery. The latter was soon felt by the Romans in many a hostile inroad. The Alemanni fought chiefly on horseback; but their cavalry was rendered still more formidable by a mixture of light infantry, selected from the bravest and most active of the youth, whom frequent exercise had inured to accompany the horsemen in the longest march, the most rapid charge, or the most precipitate retreat.

This warlike people of Germans had been astonished by the immense preparations of Alexander Severus; they were dismayed by the arms of his successor, a barbarian equal in valor and fierceness to themselves. But still hovering on the frontiers of the empire, they increased the general disorder that ensued after the death of Decius. They inflicted severe wounds on the rich provinces of Gaul; they were the first who removed the veil that covered the feeble majesty of Italy. A numerous body of the Alemanni penetrated across the Danube and through the Rhætian Alps into the plains of Lombardy, advanced as far as Ravenna, and displayed the victorious banners of barbarians almost in sight of Rome.

The insult and the danger rekindled in the senate some sparks of their ancient virtue. Both the emperors were engaged in far distant wars, Valerian in the East, and Gallienus on the Rhine. All the hopes and resources of the Romans were in themselves. In this emergency, the senators resumed he defence of the republic, drew out the Prætorian guards, who had been left to garrison the capital, and filled up their numbers, by enlisting into the public service the stoutest and most willing of the Plebeians. The Alemanni, astonished with the sudden appearance of an army more numerous than their own, retired into Germany, laden with spoil; and their retreat was esteemed as a victory by the unwarlike Romans.

When Gallienus received the intelligence that his capital was delivered from the barbarians, he was much less delighted than alarmed with the courage of the senate, since it might one day prompt them to rescue the public from domestic tyranny as well as from foreign invasion. His timid ingratitude was published to his subjects, in an edict which prohibited the senators from exercising any military employment, and even from approaching the camps of the legions. But his fears were groundless. The rich and luxurious nobles, sinking into their natural character, accepted, as a favor, this disgraceful exemption from military service; and as long as they were indulged in the enjoyment of their baths, their theatres, and their villas, they cheerfully resigned the more dangerous cares of empire to the rough hands of peasants and soldiers.

Another invasion of the Alemanni, of a more formidable aspect, but more glorious event, is mentioned by a writer of the lower empire. Three hundred thousand are said to have been vanquished, in a battle near Milan, by Gallienus in person, at the head of only ten thousand Romans. We may, however, with great probability, ascribe this incredible victory either to the credulity of the historian, or to some exaggerated exploits of one of the emperor's lieutenants. It was by arms of a very different nature, that Gallienus endeavored to protect Italy from the fury of the Germans. He espoused Pipa, the daughter of a king of the Marcomanni, a Suevic tribe, which was often confounded with the Alemanni in their wars and conquests. To the father, as the price of his alliance, he granted an ample settlement in Pannonia. The native charms of unpolished beauty seem to have fixed the daughter in the affections of the inconstant emperor, and the bands of policy were more firmly connected by those of love. But the haughty prejudice of Rome still refused the name of marriage to the profane mixture of a citizen and a barbarian; and has stigmatized the German princess with the opprobrious title of concubine of Gallienus.