First Country to Legalize Same-Sex Marriage
Concept of Social Contract
First Use of Atomic Bomb
Cuban Missile Crisis, Year
Assassination Triggering WWI
First Female British Prime Minister
Event Signifying the Start of the Space Race
D-Day Invasion, Year
First Person in Space
First African Country to Gain Independence Post-WWII
End of Apartheid in South Africa
Fall of the Berlin Wall
Axis Powers in WWII
Event Symbolizing End of Soviet Control in Eastern Europe
9/11 Attacks Location
First Industrialized Country
Chinese Cultural Revolution Start
Decolonization in Africa and Asia, Peak
Berlin Conference, 1884-1885
Event Leading to US Entry into WWII
First Man on the Moon
Climate Change Key Agreement
Event Leading to End of Cold War
Founder of Facebook
Declaration of the Rights of Man and of the Citizen, Year