I want to know the answer to the following question:
What act  of provincials brought new gods into the military?
All the background I'm provided with is that "Rome's citizen-soldiers set up altars to multiple deities, including their traditional gods, the Imperial genius and local deities – sometimes with the usefully open-ended dedication to the diis deabusque omnibus (all the gods and goddesses).". Is that enough to answer the question?