The command of the two armies on the Rhine was held at this time, after the governor of lower Germany had been made emperor, by his former colleague in upper Germany, Hordeonius Flaccus, a gouty man advanced in years, without energy and without authority, either, moreover, in fact secretly holding to Vespasian, or at any rate very much suspected of such faithlessness by the legions, who zealously adhered to the emperor of their own making. It is characteristic of him and of his position that, to clear himself of the suspicion of treason, he gave orders that the government despatches on arrival should be sent unopened to the eagle-bearers of the legions, and these should read them in the first instance to the soldiers, before they forwarded them to their address. Of the four legions of the lower army which had primarily to do with the insurgents two, the 5th and the 15th, were stationed under the legate Munius Lupercus in the headquarters at Vetera; the 16th, under Numisius Rufus, in Novaesium (Neuss); the 1st, under Herennius Gallus, in Bonna (Bonn). Of the upper army, which then numbered only three legions,[69] one, the 21st, remained in its stated quarters Vindonissa, aloof from these events, if it had not rather been drawn off wholly to Italy; the two others, the 4th Macedonian and the 22d, were stationed at the headquarters Mentz, where Flaccus also was present; and in point of fact, his able legate Dillius Vocula exercised the chief command. The legions had throughout only half of their full complement, and most of the soldiers were half-invalids or recruits. [Sidenote: First conflicts.] [Sidenote: Participation of the Germans on the right of the Rhine.]