The people of the British colonies were fed up with all the acts and taxes. The Intolerable Acts were the last straw. The Second Continental Congress was called to resolve this issue, and they sent a letter to King George III to request that the Intolerable Acts be repealed. King George laughed at this, and so the colonies began stockpiling weapons and training militia men for the upcoming war. The war that followed proved that the colonies could stand up for themselves and hold their own as a separate nation. The result of this war was the founding of the United States of America, which has become the largest and most powerful nation.
The British learned of the preparation of the colonists, and began to make preparations of their own to retaliate. The people of Boston knew the soldiers were aiming to attack Concord. Paul Revere rode from Boston to Lexington (on the road between Concord and Boston) to warn the colonists there to prepare. From there he rode to Concord to warn the colonists there as well. The Lexington men intercepted the British army at Lexington, forcing the British to flee, but not towards Boston. The British continued on their way to Concord following the loss at Lexington.
Concord is divided by the Concord river, which has a bridge over it called the North Bridge. The colonist militia went to the side of the river farther away, and awaited the British troops coming from Lexington. The British took the weapons on that side of the river, but when they tried to cross, the Concord men fired on them. The Concord men then chased the British back to Boston, where the Siege of Boston began. The British could not leave the town by land, but the port was still open, so they could theoretically receive reinforcements from England or other colonies; however, they did not. The British were able to win at the battle of Bunker Hill when the siege was broken, but the colonists were able to hold out for a while, proving that they could hold off the best troops in the world. The British also suffered many more losses in terms of numbers than the colonists, losing at least three times as many troops than the colonial army.
It was during this period that the Deceleration of Independence was written and signed. That winter, the colonies had several major victories in the northern colonies. The army continued a little bit into Canada, capturing Fort Ticonderoga and gaining access to artillery. After that, the colonists captured some ships, and fought their first navel battle at Valcour Island on Lake Champlain.
After these victories, the British made a comeback, capturing Philadelphia, New York, and Boston. Two more victories for the colonies followed. The next battle was The Battle of Saratoga. It was a turning point in the war because the colonies had their biggest win yet, even forcing the British to surrender. The British moved their focus to the south, winning several victories in Georgia. General Nathaniel Greene, however, was able to force the British out of the south as well. They fled to Yorktown, and, after one more defeat for the British at the Battle of Guilford Court House, the final battle in the war took place. It was between the French Navy (which had come to aid the colonies, as they were still at odds with Britain from the seven years war) and the British Navy. A decisive French victory was the result of this final battle, and the (second) Treaty of Paris was signed, stating that the United States of America was now its own country.
The American Revolutionary War was one of the most important conflicts. Not only did it become the start of the largest nation; it influenced many other colonies to attempt the same. Had there been no revolution, the United States may have always been a province of the British Empire.