Liber Quartus: Crisis
Caput Undecimus: Downfall
Marcus Lollius and Publius Verus accessed the throne in 916 AUC [1], and found the Empire in a piteous shape. The first task was to divide up the government between the two emperors – in their first year, they reigned together as equal consuls in Rome, office they both held in this time, before they assigned themselves different parts of the empire.
While Publius Verus was a tribute to the dynastic links with north Africa and the former Moorish, now African faction in the Senate, Marcus Lollius was the more experienced of the two emperors. While Verus enjoyed orgies under Quintus' reign, Lollius had seriously passed through the Cursus Honorum and gathered experience regarding Roman administration and government – thus, Lollius was obviously the more influential, the more active, the more creative of the pair.
Soon after their enthronement, the emperors witnessed the opening stages of the Great Migrations. The Chatti and Chauci attacked in Germania and Raetia, the Langobardi in Pannonia, the Vandals in Dacia and, most importantly, the Marcomanni, Quadi and Iazyges on the Danube.
Unsurprisingly, the army command, fragmented because of Quintus' paranoia, and the troops, having lost any discipline, were unable to prevent an important number of these incursions. For example, the provinces of Germania were defended by five legions, normally commanded by the two governors of the provinces. However, Quintus divided Germania into four provinces, so that one governor had not more than two legions under his command.
On the Danube, where a popular joke said that eleven legions were commanded by thirty different legates, the pressure on the Roman lines was especially high, and Lollius decided that only the permanent subjugation of the tribes and the provincialization of the Great Hungarian Plain as Sarmatia would end the periodic attacks on Roman territory. Nevertheless, the plains had to be secured with a limes in the north; pacification of a hostile population was not an easy task; offensives and counter-offensives, barbarian raids and Roman punitive expeditions lasted over fifteen years.
To organize the empire's defense, it was now necessary to consolidate the scattered forces and reunite the dispersed vexilliationes, thus forming powerful units. Naturally, it was impossible to implement an army reform while fighting wars on different fronts, and things improved only very slowly. The emperors Lollius and Verus first used forced marches to move legions from calm fronts to the wars on the borders:
A Quick Response Force, follwing the emperor to the threatened fronts to reinforce the local armies in critical situations. This retinue, called comitatus, was formed of the famous two additional legions formed by Quietus and the according number of auxiliary cohorts. But it soon grew, since nearly all newly formed units were added to it, and slowly evolved into a full fledged central field army, reinforcing the regional armies in their fight against barbarian incursions and deterring provincial commanders from usurping imperial power and starting a civil war.
However, the fighting soon expanded to nearly all fronts, so it became necessary to improve the efficiency of the limited number of troops. A first amelioration was the appointment of equites as legion commanders (praefectus pro legato), to replace the often incompetent former pretors and consuls of Quintus' reign. However, Lollius' conservatism and his entrenchment in the senatorial class forbade the equestrian command over legions over the long term.
To solve the problem, he bestowed the admission the Senate (adlectio) upon many equites and even former legionaries, who had become centurions and then primipilares. As senators, they could now administer senatorial offices in the army, and, without being at heart part of the senatorial class, equites promoted to the senatorial order became legion's legates.
[1] 163 CE