The "Kree–Skrull War" is considered by critics to be a highlight of its era,[3][4] and is the culmination of a string of notable Thomas–Adams collaborations from this period, which began with their run on X-Men in 1969.

[5] In 2000, almost thirty years after the "Kree–Skrull War"'s original publication, Marvel produced a trade paperback collection of the entire story arc.

This is necessary, as Mar-Vell has inadvertently absorbed a lethal amount of radiation from spending weeks in the Negative Zone, and it will prove fatal unless treated.

With husband and fellow member Henry Pym, the pair were en route via ship to a research base in the Arctic Circle, there to study the effect of oil exploration on the environment.

Mar-Vell's existence is revealed when the scientists advise the authorities as to what they witnessed, and the "Alien Activities Commission" is formed, led by Senator H. Warren Craddock.

Avengers Captain America, Iron Man and Thor apparently return to the Mansion and announce that, due to the behaviour of the team, it is now disbanded forever.

Quicksilver and the Scarlet Witch are captured when the cows turn into three members of the Fantastic Four, and then reveal they are in fact Skrulls, the ancient enemies of the Kree.

Mar-Vell, however, sees through the deception (as no humans, only Skrulls, know his true name) and destroys the device, but he is captured by Danvers (now revealed to actually be the Super-Skrull) and, along with Quicksilver and the Scarlet Witch, is taken off Earth.

Although injured, the Vision is able to return to Avengers Mansion, where founding members Captain America, Iron Man, Thor and Henry Pym (now in his original identity of Ant-Man) have gathered.

The four Avengers find and capture the Skrulls for interrogation, and determine that the aliens are in fact three of the four members of the original exploration team that once visited Earth and battled the Fantastic Four.

The Avengers defeat Maximus and his minions, and after restoring Black Bolt to power leave (with Goliath) for Skrull space, intent on rescuing their comrades.

The Avengers arrive in Skrull space, and hold off the alien fleet while Mar-Vell is forced to use the Projector, which casts a temporarily freed Rick Jones back into the Negative Zone.

[8] The secret superhero group the Illuminati are eventually revealed to have visited both the Kree and Skrull Empires and advised the aliens that involving Earth in their war would not be tolerated.