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

https://zionitwe861.clearminster.com/posts/flags-of-valor-the-significance-of-civil-war-flags-in-american-history

The Gadsden flag, providing a rattlesnake and the word "Don't Tread on Me," turned into adopted by some Confederate instruments as a image of resistance in opposition to perceived oppression.