Updated timelines

Detente, a way of making amends between two parties.
U-2 Crisis
U-2 Crisis timeline
Marshall Plan
Marshall Plan timeline
Middle Ages
Tet Offensive
Berlin Wall
Brian/ Calvin's Sports Marketing Time Line
Brian/ Calvin's Sports Marketing Time Line timeline
James Madison by Ren and Frank 12 325
James Madison by Ren and Frank 12 325 timeline
The Civil War
French Revolution
French Revolution timeline
CIvil War Timeline
CIvil War Timeline
Atoms: From the Past to the Present
Atoms: From the Past to the Present timeline
Historical timeline 1860-1920
Historical timeline 1860-1920
El romanticismo
Canadian Timeline Project
Revolución Francesa
Revolución Francesa timeline