The Action History section of an action is a read only section, and displays the following action information:
Created On – The date the action was created
Created By – The user that created the action
Completed On – The selected completion date of the action
Completed By – The user that set the completion date and completed the action
If a follow-up action has been created for the action being viewed, the Follow-up Action History will also be shown. This information is identical to the list described above.