(c) +concitata Romana acie+ is clearly ablative absolute. To make quite sure that you understand the logical connection of the thought conveyed by this sentence, you may consult the detailed analysis on page 47.
_In spite of its being such an unequal match, the battle was maintained for more than two hours; the Roman army (as well as [+et+] the enemy’s) being roused (to great exertions) so long as their leader survived._
+IV.+ +Postquam is non pro vetere fama solum, sed etiam metu futuri dedecoris, si sua temeritate contractae cladi superesset, obiectans se hostium telis cecidit, fusa extemplo est Romana acies.+
+dedecoris+ = of _dis-grace_, for +de+ in composition = separation, and so _removal_ of the fundamental idea. Cf. _un-_, _dis-_, _e.g._ +dis-par+ = _un_-equal.
+contractae+ = _brought on_, _caused_. +con + traho+ = _bring about_, _cause_.
(ii.) _Translation._--The meaning of this sentence should be quite plain to you if you notice carefully that
(a) the principal verb is +fusa est+, and the principal subject +Romana acies+, and
(b) that +Postquam ... cecidit+ is a subordinate clause of _time_ modifying the action of the principal verb +fusa est+.
It would perhaps be well to translate at first literally:--
_After that he, not only out of regard for_ (+pro+) _his old fame, but also from fear of future disgrace, if he should survive a disaster brought about by his own rashness, exposing himself to the weapons of the enemy fell, the Roman army was at once routed._
You will see that this rendering, though verbally correct, is not English, and must be considerably altered before it can be called a good translation. Thus:--
(a) _It is too long._ You can remedy this by taking +postquam ... cecidit+ as one complete sentence, and +fusa ... acies+ as another.
(b) _Exposing himself._ Better _exposed himself to ... and_. Notice here the strictly accurate use of the Pres. participle in Latin.
(c) ‘+future+’ may be omitted, as tautological[15] in English. Cf. our inexact idiom ‘_he promised to come_’ (Lat. ‘_that he would come_’).
[Footnote 15: _i.e._ needless repetition (ταὐτὸ λέγειν = to say the same thing).]
_At last, both for the sake of his old renown and from the fear of disgrace should he survive a disaster brought on by his own rashness, he threw himself among the enemy’s darts and was slain. The Roman army was routed in a moment._ --Church and B.