This is a chronology consisting of the events of the Mega Man comic series published by Archie Comics. Note that none of the video game events are listed on this timeline due to several differences with the video game adaption and/or the Mega Man comics have yet to reach a point to adapt the following video game. No speculation is given either; everything below is a correct timeline of the Mega Man comic series.
Prior to 200X
20,000 years prior to the events of Blackout: Curse of Ra Moon show that the alien Ra Moon crash landed on what is now known as the Amazon Jungle located on Earth. With humanity at its infancy, Ra Moon watched the humans fight each other to please Ra Moon. After realizing humanity was too young, Ra Moon kept himself a secret until the human species was advanced enough for Ra Moon to make havoc among the world. (MM #028)
X Years Prior 200X
Dr. Thomas Light and Dr. Albert Wily, recently graduating at the a school of technology, establish the Light Labs and build their first creation, DLN-000, better known as Blue Light. After realizing a power error in his systems, Blues is forced to be repaired to stabilize his power core. Believing that his I.C. chip will be harm and changed, Blues abandons Dr. Light and explores the world, helping out citizens in need of help. (MM #017, #018)
The United Nations investigates the Lanfront Ruins at the Amazon Jungle, but are ambushed. Dr. Pedro Astil is among one of the victims of the attack in the Amazon, losing his right arm in the process. (MM #029)
Rock Light and Roll Light were created following the disappearance of Blue Light. Dr,. Light unveils the Light Robot Masters–Guts Man, Cut Man, Bomb Man, Ice Man, Elec Man, and Fire Man–just right before Dr. Wily hacks the Robot Masters and uses them to take over the world. In a selfless sacrifice, Rock transforms into Mega Man and is successful on saving the Robot Masters along with capturing Dr. Wily. Sometime during Mega Man defeating the Robot Masters, Xander Payne is injured by Elec Man. (MM #001, #002, #016, #003, #004)