among the leaders who Wrst raided the Roman Empire in strength
following the capture of Valerian. Silvanus’ grandfather would have
been among the Frankish chiefs brought to heel by the Tetrarchy. He
may have provided troops for the Empire and given up his son,
Bonitus, as a hostage. This would have allowed Bonitus to learn
Roman ways, and so aided his rise through the military hierarchy.62
It is likely that he remained on imperial territory while raising his
family: we are told, indeed, that Silvanus was born in Gaul.63 Thus
Silvanus, for all his ‘Frankish’ origin, would have been brought up a
Roman. We know that he was a Christian;64 and Festy notes his
‘complete assimilation into Roman civilization’.65
This helps us make sense of Silvanus’ ‘usurpation’ against
Constantius II in 355. His enemies at court had striven to undermine
his position by making it seem as if he were plotting to become
emperor.66 This was ludicrous. Apart from Silvanus’ loyalty to
Constantius II, his barbarian blood disqualiWed him from donning
the purple. Silvanus was cleared of the charges in his absence.
Unfortunately, this came too late to prevent him from acting out of
self-defence: either (according to Ammianus Marcellinus) by going
against tradition and proclaiming himself emperor, or (more likely)
by working to proclaim another.67 Nevertheless, the fact that the
original accusation had found some credence conWrms that Silvanus
never looked or acted the Frankish warrior: he was, to all appear-
ances, fully Roman.68 Silvanus had a legitimate son, pardoned by
Constantius II.69 If he had completed his imperial career, that son,
Xourishing around 380, would have enjoyed enormous opportun-
ities. One thinks, for example, of the Frank Bauto, a leading general
62 Cf. above 119, below 154, 187.
63 Aurelius Victor, Caesares 42.15; cf. below 153.
64 AM 15.5.31.
65 Festy (1999: 203).
66 AM 15.5.4–5.
67 AM 15.5.15–31; Drinkwater (1994).
68 Cf. Epitome 42.11: quamquam barbaro patre genitus, tamen institutione Romana
satis cultus et patiens. It is interesting that the Epitomator, unlike Victor, gives
Silvanus only one barbarian parent which, given the propensity of leading Germanic
soldiers to marry Roman wives, appears more likely. Cf. below 322 (Stilicho). In this
case, his Christianity probably came from his mother.
69 Julian, Orat. 1.49A; 2.98C–99A.
152 Service