▁de alt ▁with ▁by ▁T iber ius ' ▁son ▁Dr us us , ▁accompanied ▁by ▁two ▁Pra et or ian ▁coh ort s , ▁the ▁Pra et or ian ▁caval ry ▁and ▁some ▁of ▁the ▁German ▁body guard . ▁The ▁German ▁mut iny ▁was ▁put ▁down ▁by ▁T iber ius ' ▁nep hew ▁and ▁adopted ▁son ▁German icus , ▁his ▁intended ▁he ir , ▁who ▁then ▁led ▁the ▁leg ions ▁and ▁det ach ments ▁of ▁the ▁Guard ▁in ▁an ▁invasion ▁of ▁Germany ▁over ▁the ▁next ▁two ▁years . ▁The ▁Guard ▁saw ▁much ▁action ▁in ▁the ▁Year ▁of ▁the ▁Four ▁Em per ors ▁in ▁ 6 9 , ▁fighting ▁well ▁for ▁O th o ▁at ▁the ▁first ▁battle ▁of ▁Bed ri ac um . ▁Under ▁Dom it ian ▁and ▁Tra jan , ▁the ▁guard ▁took ▁part ▁in ▁wars ▁from ▁D acia ▁to ▁Mes op ot am ia , ▁while ▁with ▁Marcus ▁A ure lius , ▁years ▁were ▁spent ▁on ▁the ▁Dan ub ian ▁front ier ▁during ▁the ▁Mar com ann ic ▁Wars . ▁Through out ▁the ▁ 3 rd ▁century , ▁the ▁Pra et ori ans ▁assist ed ▁the ▁em per ors ▁in ▁various ▁campaign s . ▁ ▁Political ▁role ▁ ▁Pra et or ian ▁C oh ort s ▁interven ed ▁on ▁numerous ▁occasions ▁in ▁the ▁struggle ▁for ▁the ▁imperial ▁succession . ▁L ack ing ▁troops ▁of ▁its ▁own , ▁the ▁Senate ▁had ▁no ▁choice ▁each ▁time ▁but ▁to ▁accept ▁the ▁choice ▁of ▁the ▁Pra et ori ans ▁as ▁well ▁as ▁that ▁of ▁the