Updated timelines

Dr. Seuss' Career Highlights
WW2 Timeline
WWII Timeline
Immigration across the U.S. Mexico Border
Historia del Arte
Revolutioner
LINEA DEL TIEMPO TECNOLOGIA EN LA EDUCACION
Major Batlles of WW2
Events Leading to the Russian Revolution
Evolucion de la escritura
world war 2 timeline
Us in World War 2
Timeline
The Eisenhower Years 1952-1960
The Last West and the New South
The First Crusade