Hi joe, you need the Guide to Midgard item to return to your home Kingdom: https://vikingsweb-support.plarium.com/web/en/guide/battle-for-the-throne/battle-for-the-throne-town-relocation

Have fun! 

Or  (if you wish to save the  return to midgard item)you can sit idle in jotunheim for 8 hours and your town will automatically be relocated back to your home kingdom after  the 8 hours of inactivity