Roger Stern and John Byrne introduced Chapman in Captain America #253 (January 1981); in the story he visits his friend Kenneth Crichton, grandson of original Union Jack Lord Falsworth, at Falsworth Manor and ends up putting on the costume to help Captain America in his final battle against Baron Blood.

Fabian Nicieza and Kieron Dwyer featured him in the story The Establishment for Marvel Comics Presents #42 (February 1990); in the story, set one year after his previous appearance, Chapman finds his allegiance to a group of thugs opposed to the Thatcher Government tested when they decide to terrorize Falsworth Manor; a flashback also reveals that the original Union Jack's daughter Lady Jacqueline had initially been opposed to his permanently adopting the Union Jack identity.

[2] Ben Raab and John Cassaday featured him in the three-issue Union Jack (December 1998-February 1999) mini-series; in the story he loses his friend Kenneth to the vampiric Baroness Blood.

Chapman appears as a supporting character in Ben Raab and Charlie Adlard's X-Men: Hellfire Club #3 (March 2000); in the story he rescues a reporter from assassins.

Austen along with Allan Jacobsen and C. P. Smith concluded this story in New Invaders #0 (August 2004), which launched a new ongoing series featuring Chapman as a regular character.

Chapman stars in yet another self-titled mini-series in late 2006, spun off from his appearance in Ed Brubaker's run on Captain America, written by Christos Gage[3] with pencils and inks by Mike Perkins[4] and Andrew Hennesy, respectively.

Chapman was visiting his friend Kenneth Crichton, grandson of original Union Jack, Lord James Montgomery Falsworth, when he learned of Baron Blood, who was conducting a revenge campaign against his old family at that time, and donned the costume to help Captain America fight the vampire.

[12] Chapman then encounters Mister Fantastic, Invisible Woman and Black Panther; with them, Kate McClellan, and Ben Gallagher, he battled the Bane in Africa.

[14] Later, while making a public appearance at Stark's Questworld, Chapman had no choice but to battle malfunctioning robots[15] where he received a new armor[16] which would later evolve into a new stronger mystical armour.

However, he failed to prevent Baroness Blood from using the Holy Grail to become immune to sunlight,[26] and lost his friend Kenneth Falsworth (the true heir to the Union Jack mantle) from vampirism and death.

[volume & issue needed] Wearing an updated, militaristic version of his old costume Chapman joins the New Invaders,[32][33] led by Jim Hammond.

[volume & issue needed] At the request of S.H.I.E.L.D., Chapman would help his good friend Captain America in searching the London Underground for the Red Skull's agents.

[38] Moving on from his vampire hunting days, he leads a makeshift team of heroes - including Contessa Valentina Allegra de Fontaine, Sabra and the third Arabian Knight - to defeat a group of super-powered terrorists intent on blowing up London[26] When Captain America was shot and apparently killed, a notably upset Union Jack spoke a eulogy at his memorial.

[45] Joseph later appears in Scotland helping Captain America defeat the Cult of the Darkhold, who were summoned by a monstrous creature that was accidentally freed by a Scottish fracking operation.

He carries on the Union Jack tradition by using a Webley .455 revolver (though often uses other pistols depending on the mission he is completing) and a silver dagger which he uses for supernatural foes.

[volume & issue needed] He also wore a suit of magical/cybernetic exoskeleton armor composed of unknown materials that increased his strength to superhuman levels.