Mass Effect 2/Codex/Secondary Codex/Humanity and the Systems Alliance


 * Earth
 * First Contact War
 * Gagarin Station ("Jump Zero")
 * Genetic Engineering
 * Human Diplomatic Relations
 * Systems Alliance: Geological Survey
 * Systems Alliance: Military Doctrine
 * Systems Alliance: Military Jargon
 * Systems Alliance: Military Ranks
 * Systems Alliance: N7
 * Terra Firma Party
 * Timeline