Enlistment - where?

[Emil Petecki]

'For many decades, each imperial legion had its own dedicated recruitment ground. The 3rd Gallica Legion, for example, was for many years recruited in Syria, despite its name, while both 7th legions were recruited in eastern Spain. By the second half of the first century, for the sake of expediency, recruiting grounds began to shift; the 20th Legion, for instance, which had up to that time been recruited in northern Italy, received an increasing number of its men from the East.'

From the same book quoted before -"Legions of Rome" by Stephen Dando-Collins. What I find interesting is that he mentions 'increasing number', meaning that at least some of the men might still have been recruited from Italy in the second half of the first century.