The Gadsden flag, that includes a rattlesnake and the word "Don't Tread on Me

https://daltonhmgr084.terracolumn.com/posts/behind-the-scenes-preparing-for-a-civil-war-flag-reenactment-event

The Gadsden flag, offering a rattlesnake and the word "Don't Tread on Me," was followed by a few Confederate units as a symbol of resistance against perceived oppression.