Quos Labienus equitatu consectatus, magno numero interfecto, compluribus captis, paucis post diebus civitatem recepit. Nam Germani qui auxilio veniebant percepta Treverorum fuga sese domum receperunt.
What is percepta? Is it a an ablative absolute (percipio "seize", part sg perf pass fem abl), together with fuga? Does percepta Treverorum fuga mean "the Treveri having been taken by panic", "the Treveri having been put into flight"? Or does percipio mean "perceive", in which case I don't understand what construction this could be?