Captain America is usually considered to be one of the best hand-to-hand fighters in comics. However, I've always been confused about where exactly he is supposed to have gotten these skills. Most martial artists have studied with some masters at one time or another, or there's some story explaining how they picked up their skills. Batman, for example, spent years training before becoming Batman, traveling around to various masters. Iron Fist learned at K'un L'un. Daredevil learned from Stick. Wolverine learned from Ogun. And so on.
But Cap, as far as I know, got the Super Soldier Serum, maybe got some training for a short time from some regular army folks, and suddenly was Mister Tough Guy. Granted his physical stats help, but where did he get the skills that today let him compete with people like Black Panther (trained from childhood in a long line of warriors) and so on?
Here's the best description I've found, from Marvel wikia, and while it hints at some specific trainers, Applegate and Fairbairn aren't exactly world-wide famous for their skills, and it sounds pretty suppositional:
Rogers is an expert in hand-to-hand combat being very skilled in multiple martial arts. His training first originated under combat experts Rex Applegate and William Fairbairn whose fields of expertise were European martial arts and Chinese martial arts during WW2. While the majority of the instructors' curriculums were simplified for training the Allied Forces, it is possible that they trained Rogers in the more complex techniques because his body was already developed for them and because the majority of his combat knowledge (including his gymnastic-based techniques) was already established prior to his awakening by the Avengers. As a result, Rogers is well versed in Boxing, Judo, Jujitsu, Historical Fencing and Wushu. It is also possible and likely that he studied more disciplines in the present after being discovered by the Avengers and working for S.H.I.E.L.D. but it has yet to be proven. He has utilized all martial arts techniques from physical combat to chi manipulation. Rogers is one of the finest martial artist earth has ever known.
So, Cap fans...what's up with his skills? Where did he get them?