Answer:
The Boston Tea Party.
Explanation:
On December 16, 1773 , 342 chests of tea beloging to the British East India Company were thrown by a group of colonists to the sea in Boston, Massachusetts. It was a protest against heavy taxation and harsh treatment by British authorities. "Taxation without representation" was the slogan of a growing number of dissatisfied Americans who resented taxes dictated by the Crown without having the benefit of political representation in Parliament. The incident is called the Boston Tea Party.
In a representative democracy, legislators are chosen by the people to vote on their behalf while legislation are being proposed. In a direct democracy, each topic is put to the people's vote. The primary distinction between the two systems is who gets to vote on laws: citizens or elected officials.
A journal written by frontier settlers would potentially give you insight into the thinking of individuals who were responsible of living out the philosophy of Manifest Destiny. These individuals were responsible for pushing the growth of the US westward and dealing with the uncertainties and dangers that these policies brought them. It would allow you to see whether these individuals were taking part in the westward expansion for political, economic, or other reasons.