If you want to login an another account using facebook, here's how:
1. On your hideout, tap the side bar menu and choose "option", then tap "other" tab. Choose "Switch Account" button.
2. A message box will appear if you want to switch your account by loggin in with other facebook account just tap "facebook Connect".
3. Tap "Yes" button if you want to switch your account.
By Switching your account into another facebook account. You will start again and you have a new account in War Pirates.