The Gadsden flag.
it is a historical American flag with a yellow field depicting a rattlesnake coiled and ready to strike. Positioned below the snake is the legend "DONT TREAD ON ME." The flag was designed by and is named after American general and statesman Christopher Gadsden. It was also used by the Continental Marines as an early motto flag. It was the first flag ever carried into battle by the Continental Marine Corps, during the American Revolution.