From wiki
How to sign up for the current campaign
How to sign up for the current Campaign - YouTube video
How to sign up for a battle day
The battle day signup procedure is very simple.
- First click the ABC Home link located in the banner at the top.
- On the left, click on Battle Day Sign Up.
- In the drop-down menu that appears, select the Main Battle or Black Ops you want to sign up for.
- You will see a grid with names of those who have already signed up.
- Go the bottom of the page and check the boxes corresponding to hours you are going to be available to play, click Submit and you're good to go!
No worries if you have signed up for wrong hours or just got told you need to drive your granny to the supermarket exactly when you were supposed to play. You can edit your signup attendance at any time by simply selecting the battle again and finding the purple column, changing your sign up and then clicking Save.
Remember to try and show up at least 30 minutes before the Battle Day, to let your Officers organize squads and explain tactics.