|Whatever life holds in store for me, I will never forget these words: "With great power comes great responsibility."
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Captain Jacob Keyes (Service Number 01928-19912-JK) was one of the recurring character of the Halo franchise. He commanded great respect as a highly skilled strategist and inspirational leader to those under his command. His many decorations, thirty-five years of combat experience against the Covenant, and the ability to keep a secret made him an almost natural choice to command the Halcyon-class Pillar of Autumn and its most secret cargo. He could often be seen chewing the tip of his grandfather's pipe.
His first chronological appearance is in The Fall of Reach, where, as a young Lieutenant, he accompanies Dr. Catherine Halsey on her mission to screen possible SPARTAN-II Project subjects. In 2534, Lieutenant Keyes plays a pivotal role in saving a million insurrectionists' lives from Covenant forces. By 2552, midway through The Fall of Reach Keyes is commander of the Iroquois, a UNSC destroyer. Keyes is promoted to Captain after he singlehandedly defeats four Covenant ships about to attack a human colony by performing a maneuver later named the "Keyes Loop." When the Iroquois is recalled to the human bastion Reach, a Covenant tracking device aboard the ship alerts the Covenant to the planet's existence, and they proceed to attack the colony. As the planet is glassed by the Covenant, Keyes follows Cole Protocol, which leads his new ship, the Pillar of Autumn to Halo. There, Keyes leads a guerrilla insurgency against the Covenant, until he is captured and assimilated by the parasitic Flood. After being found by the Master Chief in his assimilated state, the Master Chief sadly ends Keyes' suffering by punching into his skull to retrieve Keyes' neural implants in order to destroy the Pillar of Autumn.
Jacob was a legendary naval officer and one of the most brilliant tacticians in the UNSC Navy.