I don't get it. If this is in reference to US Politics (it almost always is), the right is red.
If it's in reference to 20th century communists, fair play.
If it's in reference to British soldiers of the 18th and 19th centuries, again fair play.
Ambiguity is the nemesis of fun.
Count again. 3 ways to get it. Including the way you've linked. My first one was correct.