For a time he fought crime on his own, serving as a hero for the common man as opposed to the aristocratic Captain Britain. Their rivalry was most apparent when they both were chosen as Knights of Pendragon by the Green Knight of Avalon. Captain Britain did not remain a Pendragon for long, but Union Jack stuck with the new team until it broke up when half the team traveled to a parallel world to offer humanitarian aid. During his time with the "KoP", Union Jack's physique increased to near Hulk-like proportions and he went through a series of alternate costumes. After the "Knights of Pendragon" break up and his enhanced musculature returns to normal, he reverts to the classic uniform and returns to fighting crime solo. He also faces a vampire cult led by a vampire who had been created by the original Baron Blood. Chapman later wears an updated, militaristic costume, and joins the modern incarnation of the Invaders, led by Jim Hammond, the original Human Torch. For a time, Chapman became romantically involved with his New Invaders teammate, Spitfire (Kenneth's mother). They have since resolved to be friends, and he remains active in the UK's espionage community. James Montgomery Falsworth was an athletic man who possessed no superhuman powers. However, he was trained in the field of espionage, a veteran of two world wars, and highly trained in armed and unarmed combat. He wore a bullet-proof costume and carried a 6-inch dagger and a Webley .455 revolver, both of which he used with great skill. Falsworth began using a wheelchair in 1942 and was debilitated by extreme old age at the time of his death. During his initial career as the second Union Jack, Brian Falsworth possessed no superhuman powers. He was a superbly athletic man, but, having been exposed to a variant of the Super Soldier Formula, was enhanced to the peak of human potential, and was highly trained in armed and unarmed combat. Like his father, he wore bulletproof fabric and primarily used a Webley .455 revolver and a 6-inch dagger. After an encounter with Thor later in his career, he gained the ability to discharge bolts of mystic lightning from his fingertips after his body was energized by a lightning strike. Like those who held the title of Union Jack before him, Joey Chapman is an athlete in peak physical condition. In addition, his strength, speed, and stamina are enhanced by the Power of the Pendragon. Chapman usually carries a handgun of some variety (changing it as appropriate to the mission) and a silver-edged dagger used for supernatural foes.