Updated timelines

1820-1850 top 15
United States Marine Corps
1820-1850
AHB
Ch. 12
Phil Jackson
Phil Jackson timeline
Effective Dates of Medical Marijuana Legalization in 15 states and D.C.
Effective Dates of Medical Marijuana Legalization in 15 states and D.C. timeline
História da Estatística x Início do Bullying
The Magical Life of AKiss
The Magical Life of AKiss timeline
Steamboats
Steamboats timeline
Revolutions
Revolutions timeline
Anti-Semitism
Anti-Semitism timeline
Chapter 28: World War 2
Native American History
Supreme Court Milestones
Native American History
Native American History timeline