The Invaders is a Marvel Comics series about a team of superheroes that fought against the original Axis of Evil during World War II. The team originally consisted of Captain America and Bucky, the original Human Torch and his sidekick Toro, and Namor the Sub-Mariner. They first appeared in The Avengers in the sixties, later gaining their own comic book series in 1975. A newer series was published in the early 2000s, in which several of surviving Invaders came out of retirement and joined up with some new members to fight terrorists inspired by their old enemies.A new volume dubbed All-New Invaders was launched in 2014 as part of the All-New Marvel NOW! initiative, featuring several of the surviving members reuniting to deal with mysterious events linked to their past.In Captain America: The First Avenger, this team was combined with the Howling Commandos. Essentially it's the Howlers but includes Captain America, Bucky and James Montgomery Falsworth (who is the British superhero, Union Jack, in the comics).Not to be confused with the TV show, The Invaders or the comic book series of the same name made by DC Comics.
Tropes found in the original series and the 2000's revival include:
The Invaders themselves. Though most of its members were actual Golden Age heroes, the team itself didn't actually exist until they were introduced in an issue of The Avengers thanks to a Timey-Wimey Ball.
Unfinished Business: The miniseries Invaders Now! implies this is the reason for all the various freezings, deagings, and resurrections that allowed Namor, Captain America, Bucky, Spitfire, Torch, and Toro to make it to the present day. Aarkus explains that he'd been steering their various reemergences and resurrections because he sensed that an unspeakably terrible mission of theirs was going to have consequences due to a magical force being invoked around it. It becomes this trope when Aarkus says that he can't reach the second Union Jack, Brian Falsworth, because his soul is at peace. Brian turns out to be the only one of the Invaders who flat-out refused to participate in that mission.
Band of Brothers: And they're not ashamed of it, it's not at all uncommon to see the characters address or refer to each other as "my brother."
Cast Speciation: Metatextually, this is why Toro has only been shown in a flashback so far: he, the original Human Torch, and the Fantastic Four's Human Torch all have the exact same powers. James Robinson has said in interviews that one of his goals is to make it so that if you saw Jim Hammond and Johnny Storm standing right next to each other with their flames on, you'd be able to tell them apart, and part of this will apparently involve redefining Toro's power set as well.
Human Torch: Anyway, Japan's love for Radiance borders on hysterical worship, especially amongst a certain demographic of young men and women.
Faux Death: The Winter Soldier pulls one in issue #5.
The Friend Nobody Likes: "Friend" is definitely pushing it, but Namor is this to the Marvel heroes at large. Even Cap admits that most people hearing he'd been captured by the Kree would say good riddance, the Kree can keep him.
Nice Job Breaking It, Hero: In Original Sin, we learn that Sun Girl is partially responsible for use of the A-Bombs on Hiroshima and Nagasaki, as she and the other Kid Commandos sabotaged a previous attempt to defeat Japan without having to use nuclear weapons. Radiance is not pleased when she finds this out.
Older than They Look: Thanks to long stints as a Human Popsicle, being an android, having a blood transfusion from an android, being an Atlantean, and straight-up coming back from the dead, the Invaders are all chronologically in their 90s, but not a damn one of them looks a day over 25. 30, at most.
Remember the New Guy: Major Liberty, a previously-unseen member of the Invaders who died during his first mission with the team. The character was actually an existing Golden Age hero, just a rather obscure one who hadn't appeared in decades, and was not part of the original Invaders series.
Radiance is stated to be the most popular hero in Japan, even beating out the Big Hero 6 and Sunfire from the Uncanny Avengers. She'd also never appeared at all before the issue that made that proclamation.
Taking the Heat: Namor, after the Invaders refuse to use their powers to send a tsunami at Japan, knowing he's known as a wild card, takes the heat for the team.