 From the south his "magister peditum" Barbatio was to come from Milan and amass forces at Augst (near the Rhine bend), then set off north with 25,000 soldiers; Julian with 13,000 troops would move east from Durocortorum (Rheims).However, while Julian was in transit, a group of Laeti attacked Lugdunum (Lyon) and Julian was delayed in order to deal with them.This left Barbatio unsupported and deep in Alamanni territory, so he felt obliged to withdraw, retracing his steps.