Sentry-459 The Sentries' main purpose is to stand guard over military outposts and depots throughout the Kree empire. Sentry-459 accompanies a Kree scientific party who journey to Earth to experiment on sub-humans, which eventually results in the creation of the
Inhumans. When the Kree leave Earth, Sentry-459 remains to monitor Inhuman progress, with the Kree intending to use them as a militia force. Sentry-459 remains inert until it is inadvertently activated by the
Fantastic Four, who battle it to a standstill. Considering itself defeated when the Fantastic Four escape, the Sentry sends a signal to the Kree alerting them to the presence of superhumans on Earth before deactivating itself. The Kree
Ronan the Accuser investigates the signal and battles the Fantastic Four soon after. The U.S. Army transports the Sentry to
Cape Canaveral, where it is reactivated by
Yon-Rogg, a Kree colonel and the leader of an expedition investigating Earth. Yon-Rogg attempts to use the Sentry to kill his subordinate
Mar-Vell, who manages to defeat it. Ronan the Accuser later reactivates the Sentry and uses it in an attempt to reverse the course of evolution on Earth, but it is defeated by Mar-Vell. Kree agents attempt to retrieve the Sentry, but are driven off by
S.H.I.E.L.D. The Sentry is later activated by the
Super-Adaptoid, who recruits it into his team
Heavy Metal in a bid to destroy the
Avengers. The Sentry returns in the
Blackwulf series, having been found by
Ultron and recruited into his Underground Legion. It is eventually destroyed in battle.
Other Kree Sentries Sentry-9168 Another Sentry - Sentry-9168 - is encountered by the Fantastic Four on the Moon. This Sentry is smaller than traditional Sentries, being the size of a human, and is programmed to protect the remains of a hidden Kree city on the Moon. The Fantastic Four battle and destroy the Sentry via a remote destruct mechanism.
Sentry-213 Sentry-213 is a tall Sentry stationed in an unmanned supply depot/surveillance post on
Uranus. It is destroyed by a group of
Eternals led by
Uranos, sparking a war with the Kree.
Sentry-372 This Sentry only appears once, and battles several members of the
Imperial Guard before being damaged by the
West Coast Avengers. The Sentry self-destructs and destroys the outpost it was guarding.
Sentry-571 Sentry-571 aided the Kree when their Lunatic Legion attacked Earth. It was defeated by
Iron Man. ==In other media==