ESO FAQ >> How Do You Enter Cyrodiil (PVP)
How Do You Enter Cyrodiil (PVP)
You can enter Cyrodiil – the big PVP zone – when you reach level 10. At this point you must assign yourself a Home or a Guest Campaign in the Alliance War interface. You Home Campaign will be where you can earn a place on the leader boards. Your Guest Campaign is where you can go if you want to try another Campaign or play with friends on another Campaign. You won’t get ranked on the leader board in your Guest Campaign.
Once you set a Home Campaign you can then enter by either selecting your Campaign and then selecting Travel To Campaign. This will place you in a queue to join. You can also just travel to the Cyrodiil Wayshrines to enter your Home Campaign.
To leave Cyrodiil you must go back to the Wayshrines at your Alliance gates.
More details can be found in the Cyrodiil And PVP Guide.