Where would I find information to develop a timeline for a history of politics?

Question

Where would I find information to develop a timeline for a history of the growth and participation in the political proccess with important events and milestones??? This is for the years 1215-1776 (magna carta-declaration of independence)
In other words, i'm making a timeline about what events lead up and made government... and i don't know where i could find the info about this :) thanks ahead of time, and any random site with random world history events isn't really helpful, i need something that will tell me the events that lead up to a government :)

Answer 1

www.timelineindex.com/
content/select/809/912,8
09?pageNum_rsSite=2&
totalRows_rsSite=124

Answer 2

Oxford University