by Marvel A Kree Sentry heads for the nuclear warheads at The Cape missile base. Captain Mar-Vell announces his Kree military rank but Sentry #459 doesn’t stand down as it is programmed to destroy anything that blocks its mission. Mar-Vell blasts the Sentry with his Uni-Beam and the giant retaliates. Mar-Vell escapes using his jet belt but doesn’t fly too far in case the android turns its attention to nearby troops. A soldier overhears the Man of Kree call himself Captain “Marvel” and thus it becomes his heroic name. Mar-Vell increases the intensity of his Uni-Beam and the blast makes the Sentry’s outer shell break apart. However the android gathers the broken fragments and begins self repairing to become even stronger. Meanwhile above the Earth , Colonel Yon-Rogg views the events from his star ship, sure his rival will be killed by the Sentry allowing him to win the heart of the woman they both desire, Medic Una.
This is how the story of Captain Mar-Vel at Marvel Comics began.