Updated timelines

Civil War Timelines by Halas
Civil War Battles Timelines by Jason Hassett and Scott Higgins
Civil War timellines Emily Lugo, Chrystal Udumukwu
June 14
M. Skiles, Period 4
1960 to 1970's
Jeffrey Dahmer's Life
Texas wins independence from Mexico
1960s and 1970s
1960's - 1970's Events
1960's/1970
Mexican-American war
1960s and 70s timeline
Battle of Puebla
L. Ashcroft, Period 5
Отношение США с Россией