ME Timeline

Mass Effect

 * Codex entry is under "Timeline".

2069
Armstong Outpost at Shackleton Crater becomes the first human settlement on Luna. It is formally founded on July 24, the 100th anniversary of the first lunar landing.

2103
Lowell City in Eos Chasma becomes the first human settlement on Mars.

2137
Eldfell-Ashland Energy Corporation demonstrates helium-3 fuel extraction from the atmosphere of Saturn.

2142
Construction of Gagarin Station (Jump Zero) begins beyond the orbit of Pluto.

2148
Prospectors discover the Prothean ruins at Promethei Planum on Mars.

2149
Translation of Prothean data leads humans to the Charon mass relay. Systems Alliance founded to coordinate exploration and colonization of extra-solar worlds.

2151
A shipping accident at Singapore International Spaceport exposes downwind communities to containers of dust-form element zero. Alliance begins construction of Arcturus Station.

2152
Roughly 30% of the children born in Singapore after element zero exposure suffer from cancerous growths. Systems Alliance begins settlement of Earth's first extra-solar colony world, the planet Demeter.

2154
Commander Shepard born.

2155
Systems Alliance occupies completed portions of Arcturus Station as a headquarters.

2156
Some children of Singapore exhibit minor telekinetic abilities.

2157
Turians encounter human explorers; First Contact War. Occupation and liberation of the human colony world of Shanxi.

2158
Humans learn potential of biotics. An international effort to track element zero exposures begins. Roughly 10% of exposed children show some level of biotic ability.

2160
Systems Alliance Parliament formed.

2165
Humans establish embassy on Citadel.

2170
Batarian slavers attack the Alliance colony of Mindoir.

2176
Skyllian Blitz - Pirates and slavers attacked Elysium, the human capital in the Skyllian Verge.

2177
Thresher maws devour the Alliance colony of Akuze.

2178
In retaliation for the Skyllian Blitz, an Alliance fleet wipes out an army of slavers on the moon of Torfan.

2183
Current date.

Mass Effect 2 additions

 * Codex entry is under "Timeline".

2183
Geth led by rogue Spectre Saren Arterius attack the Citadel, ensuing in a battle that cost thousands of lives. A few weeks later, the SSV Normandy is ambushed and destroyed. Commander Shephard is presumed dead.

2185
Current date.

2185
An alien race known as the Collectors abducts thousands of human colonists in the Terminus Systems. Commander Shepard leads a team beyond the Omega 4 relay to attack the Collectors where they live, stopping the abductions.

2186
Current date.