Step 1: Shut down the servers.
Step 2: Let the warband withdrawal symptoms slowly build up inside of NA players over the course of a couple months.
Step 3: Re-open the servers for another 2-3 months of unhealthy non-stop warbanding.
Step 4: Wait for everyone to burn out from playing too much warband all at once.
Step 5: Watch NA temporarily die.
Step 6: Rinse and repeat.