Section 4

On the Rhine frontier, while the pagan emperor Julian was conscripting forces to repel an anticipated invasion of Germans, Martin refused to reenlist, telling Julian that he was now a soldier of Christ. Martin was imprisoned and was about to be put on the battlefield without armor, when the threat of the invasion miraculously dissipated.

irruentibus intra Gallias barbaris:  the reference is to an invasion by Germans in 352; Julian's first counterattack came in 356 (Ammianus Marcellinus, History of the Later Roman Empire 16.2-3). He began at Autun in Alcase and then moved to the Rhine, eventually pushing the Germans all the way back to Cologne.

civitas Vangionum: Worms, on the Rhine in present day Germany, but then on the eastern frontier of Gaul.

coacto: 'brought together' (> cogo, -ere, -egi, -actum)

ventum est: 'it was come', i.e. 'they came'. Impersonal passive (AG 566).

ut est consuetundinis: 'as is of custom', i.e. 'as is customary'. A type of possessive genitive, cp. moris est (AG 343).

neque enim integrum sibi fore arbitrabatur: 'nor did he think that it would be honest for him'. fore = futurum esse.

patere: 'allow,' 'permit' (> patior, pati, passus sum), 2s imperative.

militem: 'serve as a soldier' (> milito (1)), subjunctive in a jussive noun clause (AG 440).

pugnaturus: '(the man) about to fight'. Substantival use of the participle (AG 499).

adversus hanc vocem: 'in response to this remark'

gratiā: 'for the sake of', ablative with a preceding genitive (religionis).

immo: 'on the contrary'.

inlato sibi terrore: 'with intimidation having been applied to him' (abl. absol.) (inlato > infero, -ferre, -tuli, -latum).

signo...clipeo...galea: abl. of means with protectus.

retrudi . . . in custodiam: 'to be held under arrest'.

facturus fidem dictis: 'about to make good on his words'

ut...obiceretur: 'so that he might be exposed', purpose clause after retrudi (AG 531).

dedentes: 'surrendering' (> dedo, -ere).

beati viri . . . fuisse: 'belonged to the blessed man', or 'was due to the blessed man' (possessive genitive).

praestitum sit, ne: 'it was provided that he not', impersonal passive, followed by a purpose clause (AG 566)

licet: 'even'

vel aliorum mortibus: 'even by the deaths of others'.

sancti . . . obtutūs: '(Martin's) sacred gaze', lit. 'gazes' (obtutus, -us m.).

exemit: 'removed' (> eximo).

neque . . . aliam . . . victoriam, quam ut: 'no other (type of) victory than that', followed by a substantive clause of result (AG 571a).

subactis sine sanguine hostibus: 'since the enemy was subdued without bloodshed' (abl. abs.)