Armageddon was created using the combined genetic code of Apocalypse and Jean Grey.
He would however turn against his father and join the X-Men, with the resulting battle leading to Apocalypse's death.
Armageddon also aided the X-Men in combating Cyclops Brotherhood. He knocked himself unconscious when he ruptured Radioactive-Man's containment suit and blew up, resulting in Radioactive-Man's death.
Nocturne would then take possession of Armageddon's unconscious body to use his telekinesis and force Wolverine to stab Cyclops in the chest.