2 ▁during ▁a ▁brief ▁period . ▁This ▁ins cription ▁referred ▁to ▁one ▁man ▁who ▁was ▁the ▁trib une ▁of ▁two ▁success ive ▁coh ort s : ▁the ▁ele vent h ▁coh ort , ▁apparently ▁at ▁the ▁end ▁of ▁the ▁reign ▁of ▁August us , ▁and ▁the ▁fourth ▁at ▁the ▁beginning ▁of ▁the ▁reign ▁of ▁T iber ius . ▁According ▁to ▁T ac it us , ▁there ▁were ▁only ▁nine ▁coh ort s ▁in ▁ 2 3 ▁AD . ▁The ▁three ▁urban ▁coh ort s , ▁which ▁were ▁number ed ▁consec ut ively ▁after ▁the ▁Pra et or ian ▁coh ort s , ▁were ▁removed ▁near ▁the ▁end ▁of ▁the ▁reign ▁of ▁August us ; ▁it ▁seemed ▁probable ▁that ▁the ▁last ▁three ▁Pra et or ian ▁coh ort s ▁were ▁simply ▁renamed ▁as ▁Urban ▁C oh ort s . ▁ ▁The ▁first ▁inter vention ▁of ▁the ▁Pra et ori ans ▁on ▁a ▁battle field ▁since ▁the ▁wars ▁of ▁the ▁end ▁of ▁the ▁Republic ▁took ▁place ▁during ▁the ▁mut in ies ▁of ▁P ann onia ▁and ▁the ▁mut in ies ▁of ▁Germania . ▁On ▁the ▁death ▁of ▁August us ▁in ▁AD ▁ 1 4 , ▁his ▁successor ▁T iber ius ▁was ▁confront ed ▁by ▁mut in ies ▁in ▁the ▁two ▁arm ies ▁of ▁the ▁Rh ine ▁and ▁P ann onia , ▁who ▁were ▁protest ing ▁about ▁their ▁conditions ▁of ▁service , ▁in ▁comparison ▁with ▁the ▁Pra et ori ans . ▁The ▁forces ▁of ▁P ann onia ▁were ▁de alt ▁with ▁by ▁Dr us us ▁Julius