The XX Valeria Victrix legion was one of the four that invaded Britain in 43 AD. They were stationed at Colchester , Chester and then Carlisle from where they invaded Scotland in AD 78-84. The legion emblem is a jumping boar.
In Scotland they built the fortress at Inchtuthil the most northerly Roman Legion fortress in the Empire.
They continued to be stationed in Britain for 300 years with occasional postings abroad and helped build Hadrians wall.
They Legion was initially stationed in Chester and a tombstone there reads “To the spirits of the departed, Caecilius Avitus from Emerita Augusta, optio of the twentieth legion Valeria Victrix, served 15 years, lived for 34 years. His heir had this stone made” He was Spanish from the city of Merida.
See The XX Legion in Britain from Warwick university.