Simon Bar Kokhba against romans lead his army 3 years but Hadrian set in game one of the best Britain generals Sextus Julius Severus which turn war lucky into Hadrian side.
Julius Severus' campaign
Following a series of setbacks, Hadrian called his general Sextus Julius Severus from Britannia, and troops were brought from as far as the Danube. In 133/4, Severus landed in Judea with a massive army, bringing three legions from Europe (including Legio X Gemina and possibly also Legio IX Hispana), cohorts of additional legions and between 30 and 50 auxiliary units. He took the title of provincial governor and initiated a massive campaign to systematically subdue Judean rebel forces. Severus' arrival almost doubled the number of Roman troops facing the rebels.
The size of the Roman army amassed against the rebels was much larger than that commanded by Titus sixty years earlier - nearly one third of the Roman army took part in the campaign against Bar Kokhba. It is estimated that forces from at least 10 legions participated in Severus' campaign in Judea, including Legio X Fretensis, Legio VI Ferrata, Legio III Gallica, Legio III Cyrenaica, Legio II Traiana Fortis, Legio X Gemina, cohorts of Legio V Macedonica, cohorts of Legio XI Claudia, cohorts of Legio XII Fulminata and cohorts of Legio IV Flavia Felix, along with 30-50 auxiliary units, for a total force of 60,000–120,000 Roman soldiers facing Bar Kokhba's rebels. In addition, it is generally considered that Legio XXII Deiotoriana took part in the campaign, and was annihilated. It is plausible that Legio IX Hispana was among the legions Severus brought with him from Europe, and that its demise occurred during Severus' campaign, as its disappearance during the second century is often attributed to this war.