This is the page for the timeline of the Mega Man X series.

Pre-series

AD 20XX

The events of the Mega Man (Classic) series occur.
Dr. Light creates X, and seals him in a capsule to test his diagnostics for approximately 30 years.
Dr. Wily creates Zero but doesn't finish him in time, forcing him to seal him in a capsule full of Maverick Virus.
Both Dr. Light and Dr. Wily pass away.
Dr. Cain is born.

April 10: Dr. Cain conducts an archeological expedition, wherein he finds Dr. Light's laboratory and uncovers X's capsule. He awakens X and uses Light's tech to make the first of the Reploids. The Reploids are quickly accepted by the humans, and they enter mass production.
February 16: Irregular and dangerous Reploid behavior begins occurring, resulting in such Reploids being labeled Maverick. To counter this, Dr. Cain forms the Maverick Hunters, a Reploid organization devoted to detaining Mavericks. He designates his most advanced Reploid, Sigma, as the force's commander.
Zero is discovered and classified as a Maverick due to his violent behavior. Maverick Hunters are deployed, but he kills many of them. Sigma himself fights Zero in Dr. Wily's laboratory and just barely manages to defeat him - however, Sigma is infected by the Maverick Virus in the process.
Zero is repaired by Dr. Cain and reforms as a Maverick Hunter, working in the 17th Elite Unit under the command of Sigma. Meanwhile, Sigma develops Maverick thoughts due to the virus, but hides it. He begins secretly approaching his strongest Hunters, enlisting them to aid in an upcoming Reploid rebellion against the humans.
June 4: Sigma goes Maverick and openly declares his anti-human rebellion, beginning the Maverick Wars. Zero is made the de facto leader of the Maverick Hunters in Sigma's absence, and X decides to join the Hunters in order to help stop the conflict.

Mega Man X - Sigma's first rebellion occurs.
- Mega Man: Maverick Hunter X (rebooted universe)
Mega Man X2 - The X-Hunters lead the remnant Mavericks.
Mega Man Xtreme - The Shadow Hunters hack the Mother Computer.
Mega Man X3 - Dr. Doppler makes Dopple Town a military state.
Mega Man Xtreme 2 - The Soul Erasers cause the Erasure Incident.
Mega Man X4 - The Great Repliforce War breaks out.
Mega Man X5 - Sigma instigates the Earth Crisis.
Mega Man X6 - Gate causes the Nightmare Incident.
Mega Man X7 - Red Alert challenges the Maverick Hunters.
Mega Man X8 - The new generation Reploids revolt.
- Mega Man X: Command Mission (alternate universe spin-off)
- Mega Man X DiVE (non-canon spin-off)

Zero enters stasis to allow a deep analysis of his body's true power. This process yields Cyber-Elf technology, including the powerful Mother Elf. X uses the Mother Elf to erase the Sigma Virus completely and end the Maverick Wars forever.
Dr. Weil proposes Project Elpizo to control Reploids, but X vetoes it. Bitter, Weil corrupts the Mother Elf into the Dark Elf to instigate the Elf Wars. This four-year period kills 90% of the planet's Reploids and 60% of the planet's humans. Weil also steals Zero's static body and modifies it into Omega.
Zero's mind is given a new body to fight in the Elf Wars. Together, Zero and X defeat Dr. Weil, Omega, and the Dark Elf. Weil is banished with a regenerative armor to suffer forever in the uninhabitable wasteland. Omega is banished to space.
Neo Arcadia is constructed as a city-state where humans and Reploids live together in peace, and X rules it in justice. Zero seals himself away again.
Though the Elf Wars are over, the Dark Elf continues to cause chaos. X seals her within Yggdrasil using his own body. Ciel creates Copy X and the Four Guardians to rule Neo Arcadia in his stead. However, Copy X turns out to be a tyrant, and a Resistance forms to fight his rule.
The events of the Mega Man Zero series occur.