Travis Morgan was an elite Air Force pilot, who on a mission for the United States entered into a portal within the crust of Earth-One into the world of Skartaris. This "world within a world" led him to various adventures wherein he faced his the evil Deimos and fell in love with Tara, Queen of Shamballah. Becoming known as the Warlord, Morgan along with his friends stumbled onto a another portal, this one leading him to an ancient age parallel to that which his counterpart lived in a universe away.
Brian Kent was the son of Sir Edwin Kent, who was a legendary hero in the 6th Century of Earth-Two, until Edwin was slain in battle versus his arch-foe the bearded warlord known as Sir Oswald Bane. As a young man, Brian under the tutelage of his mentor Sir Grot stumbled upon a special armor in the forest. Donning it, he adopted the masked alter ego of the Silent Knight. Over time, his courtship with Lady Celia Penbrook grew until she became a partner in his fight to do right.
Silent Knight himself was pulled into the 20th century during the Crisis on Infinite Earths, where he teamed up with that age's largest assemblage of heroes in the All-Star Squadron. Back in his native era, he had such foes as artificially powered and adaptable Thando who mirrored Deimos as both used tricky to appear magical. Warlord himself was extracted from his adopted world to accompany fellow heroes on board a satellite aborting his home world Earth-One during that same Crisis.