Updated timelines

Civil War
Богдан Хмельницький
Mohandas Gandhi
Hernan Cortes
Ellison S. Onizuka
Sally Ride
sacagawea
Valentina Tereshkova
Wright brothers
Ferdinand Magellan
Yuri Gagarin
Civil War
Neil Armstrong's time line
Mary Henrietta Kingsley
Marco Polo
Alexander th Great