When did the Roman Army decline?

[Mrbsct]

Vegetius true or not, the is beyond a shout of a doubt the army by the time of Julian was no way the army of a century earlier or even the quality of Constantine's army. It is estimated the only 1/3 of the total Danube army was deployed at Adrianople. Army of Thrace, Army escorts I and II in the area would have 60,000 men on paper. Only 20,000 showed up at Adrianople. The condition was so bad that they had to recruit barbrarians by the time of Theodosis.