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He hasn't been promoted because he isn't active military personnel. It's that simple. He is considered "retired" from the US Army.

• He had a rank when he was in the Army and when he "died" that was the rank he wore.




• When he was found and revived, the world he lived in included many beings of superhuman stature and his previous ranking became a "sobriquet" denoting his previous service and a "recognizable brand".




• He is a consultant with SHIELD providing "special operation services".




• If he were to rejoin the Army in an active military capacity, he would then be eligible for promotions allowing him to increase in rank and I suspect considering his abilities and strengths as a leader would quickly find himself promoted.




• In the canon Marvel Universe, Captain America is considered to be the finest tactical leader the Avengers have ever had and during times of combat, almost everyone INCLUDING Thor will defer to the Captain's judgment.




• And as far as any marketing guru will tell you, you don't change a winning brand.

"Captain" in his case is generally not seen as a 'rank' in the strict sense but is his Nom de guerre, his 'war name'. Though he has the authority of a combat field commander, he was originally assigned the CODE NAME 'Captain America' as a result of the Super-Soldier Program and because it was a catchy name for the anti-Nazi propaganda campaign at the time, not because he attended West Point and was promoted through the ranks to the rank of Captain.

(Note: He didn't even go through Army basic training bootcamp)

Some backstory;

Steve Rodgers went from being a scrawny civilian, allowed to enlist, was administered the Super-Soldier Serum (which was obviously a success), put through an intensive 3 month physical and tactical training program, was then 'appointed' the CODE NAME 'Captain America'. All of this happened in the span of a little over 3 months. His Nom de guerre is so well known that it would never be changed to 'Lt. Col. America' no matter how many people he commanded.

Made an account just to answer, but I answer mostly because I can't comment

Most likely because the "Captain" part is not really a "rank", but a moniker. Kind of like "Captain Obvious". Nobody has ever demoted Captain Obvious, no?

By the way, you don't need to be serving an "army" to be assigned a "rank". Colonel Sanders was a businessman, for example, and his rank is higher than America

For those of you who are saying that Captain America, the Steve Rodgers version, was not a soldier and never went through Basic Training I looked it up on Two Marvel websites which appear in the image included here. As you can see from the top portion of the image taken from Marvel.com it says "After EXTENSIVE COMBAT TRAINING He debuted as Captain America". The bottom portion of the image from marveldirectory.com says "Rodgers was put through an INTENSIVE PHYSICAL AND TACTICAL TRAINING PROGRAM which included Hand-to-Hand combat and Military Strategy". So, according to Marvel themselves, Steve DID go through Basic Training and also something akin to an abbreviated Officer's training program since both Hand-to-Hand and Military Strategy were part of the curriculum in Captain's Career Course when I was Cadre working there. I think the reason he hasn't been promoted is that he was retired when the world thought him dead. Given his training, he could have been commissioned and rose through the ranks to Captain, or he may have been an enlisted person who was posthumously given a battlefield commission and promoted to the rank of Captain. Until Marvel states what the official backstory is on his character all we can do is speculate on his rank, however, the fact he DID go through basic and other training is Canon.