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Not including his adventures with the Avengers, here are the first 10 villains Captain America fought in his own comic book stories, ranked by power.
10) Sando & Omar

The story in Tales of Suspense #64 takes place in the past, when Captain America and Bucky Barnes agree to investigate a popular stage show where Omar and Sando predict the future using a crystal ball. However, the twist here is that Sando was the real villain, and he was forcing the helpless victim, Omar, to help him. There also wasn’t magic, as a projector was shooting the images into the ball. Along with Agent 13 (Betsy Ross), Cap stopped Sando after fighting off some Nazis to end the threat.
9) Bull

Captain America fought several villains who were not powered at all early on as he made his way into Marvel Comics. In one comic book, he actually had to fight criminals during a prison escape. While that isn’t included in the countdown since it was just Cap stopping the breakout and none were actual singular villains, he did fight an organized group of criminals led by a man named Bull in Tales of Suspense #59. Bull was a mafia boss who thought killing Captain America would stop the Avengers, but things didn’t work out well. While he had high-tech weapons and a man in an armored suit, Cap had little trouble beating them.
8) Sumo

In Tales of Suspense #61, Captain America travelled to Vietnam and launched a one-man attack on the Viet Cong troops. It turned out Cap went in to barter for the release of an American helicopter pilot. This led to Cap finding the pilot, Jim Baker, whose brother was a friend of Cap’s from World War II. The Viet Cong sends a giant named Sumo to attack Cap, and he is a match for the hero’s strength, but not for his skills, and Captain America easily wins the fight and escapes with Jim.
7) THEM

THEM was a terrorist organization that Baron Strucker created in Hydra. This group ended up directing two other subsidiary organizations of Hydra: AIM (Advanced Idea Mechanics) and the Secret Empire. However, while THEM ruled over AIM, the organization in no way has the same legacy as AIM. That said, THEM developed the Cosmic Cube, revived the Red Skull, and did so much more. They were deadly and dangerous, but only appeared in 10 total Marvel Comics and have been mostly forgotten over the years. Their first appearance was in Tales of Suspense #75, and Cap faced them in three different comics that year.
6) Nazis

Captain America fought some interesting villains in his first couple of years, but he fought one group more than any other. Captain America fought the Nazis in eight different comics before he finally reached 10 total villains. This makes sense because Cap was a World War II hero, and he always fought Nazis to protect America from the fascist evil they spread. In some cases, the Nazis worked with Red Skull, and in other cases with AIM and THEM. However, in many of these issues, Captain America was just fighting armies of Nazis, both in flashbacks to World War II and in the modern day, where they remained a thorn in the side of freedom.













