Tap the Alliance button in the bottom right corner.

Click the Options Menu in the top right corner and select “Leave Alliance”.

You will be asked for confirmation once you select the “Leave Alliance” button. Tap the Confirm button to leave your current Alliance.

If you are the leader of the Alliance that you are leaving, you will be asked to nominate a new leader before tapping the Confirm button.

Note: Leaving your Alliance will cause you to lose your rank, Alliance benefits, and Alliance progress.