NoDictionaries   Text notes for  
... opperientes, ac vis [si] ingrueret, provisis exemplis Caudinae Numantinaeque...

Note the imperfect subj. of a protasis in virtual o. o. expressing the thoughts of the soldiers and the apodosis expressed by the abl. abs.; "if the violence/force (of Vologeses against them) increased/bore down, examples/precedents were provided (of other Roman armies that had surrendered)."