This picture shows the French and Indian War. This is an important event because it sets the foundation for the events to come. If the French had won the war, the United States may never have come to be. But, because the British won the French and Indian war, the Britain lost a lot of money, they had to tax the colonists, and because of taxation without representation (among other things) the colonists rebelled.
Boston Tea Party 1773 Dec 16
This picture shows a representation of the proclamation of the Stamp Act, and colonist's horrified faces at taxation without representation. Of course back in the 1700's they wouldn't have had new stands, but here it represents a place people go to meet up and see whats happening in the world. This event is important because it's the first thing that the British will do to upset the colonists. This is Britain's first power move, Britain's first of the many to come unfair proclamations, this triggers the events to come.
Intolerable Acts 1774
!!WELCOME TO MASSACHUSETTS!!
ATTENTION: BRITISH CANNOT BE ARRESTED OR PUT ON TRAIL IN THE COLONIES, THEIR CASES WILL GO STRAIT TO BRITAIN.
This picture shows the home of a colonist and a colonist dropping her tea in anger as she's told about the Tea Act. The event is important because it shows how the colonists went from shocked at the Stamp Act, to angry at the Tea Act, this brings them closer to a rebellion.
Battle of Lexington
This picture shows the Boston Tea Party. This event shows the first real act of rebellion the colonists do, and it really hurts the British. The British are forced to deal with this, where as they could just ignore the colonists when they tarred and feathered the Tax collectors. This really gets the British attention. After the Boston Tea Party Britain starts to take the Colonists and their situation in the colonies seriously.
British East India Tea Company
This picture shows the British Officers stomping on the law (shown in the form of handcuffs and parchment) in Massachusetts because the British Parliament has granted them the right to only be trialed in Britain, where they can surely be excused for almost any crime, they are basically free of the law in the colony of Massachusetts. This event is important because this, and the other Intolerable Acts, are the last straw for the Colonists. After this the majority of the Colonists are planning a revolution.
This picture shows a world map and the social traveling of the first gun shot at the battles of Lexington and Concord, how the news that the poorly funded colonists decided to take on one of the strongest militaries of their time was important enough that people all around the world heard it. This shot is the physical start of the revolution, and sparks the idea of a revolution in other places Britain had conquered, because if the colonists could do it why couldn't they?!