The combat flag of the Army of Northern Virginia changed into probably the most most iconic symbols of the Confederacy

https://manuelwxvt746.urbanvellum.com/posts/civil-war-flag-history-what-every-collector-should-know-2

The struggle flag of the Army of Northern Virginia grew to become some of the most iconic symbols of the Confederacy, steadily linked to the management of General Robert E. Lee.