typo”: meant say “The Stars and Bars isn’t the flag being raised on Mt. Surabachi’’.
https://en.wikipedia.org/wiki/Modern_display_of_the_Confederate_flag
Unofficial military use
During World War II some U.S. military units with Southern nicknames, or made up largely of Southerners, made the flag their unofficial emblem.
The USS Columbia flew a Confederate Navy Ensign as a battle flag throughout combat in the South Pacific in World War II. This was done in honor of Columbia, the ship’s namesake and the capital city of South Carolina, the first state to secede from the Union. Some soldiers carried Confederate flags into battle.
After the Battle of Okinawa a Confederate flag was raised over Shuri Castle by a Marine from the self-styled “Rebel Company” (Company A of the 1st Battalion, 5th Marines). It was visible for miles and was taken down after three days on the orders of General Simon B. Buckner, Jr. (son of Confederate general Simon Buckner, Sr.), who stated that it was inappropriate as “Americans from all over are involved in this battle”. It was replaced with the regulation, 48-star flag of the United States.[10] By the end of World War II, the use of the Confederate flag in the military was rare.[11]
http://thecivilwarparlor.tumblr.com/post/84096242227/world-war-ii-how-the-confederate-flag-made-its