The Boston Massacre, called The Incident on King Street by the British, was an incident on March 5, 1770, in which British Army soldiers killed five civilian men. British troops had been stationed in Boston, capital of the Province of Massachusetts Bay, since 1768 in order to protect and support crown-appointed colonial officials attempting to enforce unpopular Parliamentary legislation. Amid ongoing tense relations between the population and the soldiers, a mob formed around a British sentry, who was subjected to verbal abuse and harassment. He was eventually supported by eight additional soldiers, who were subjected to verbal threats and thrown objects. They fired into the crowd, without orders, instantly killing three people and wounding others. Two more people died later of wounds sustained in the incident.

The crowd eventually dispersed after Acting Governor Thomas Hutchinson promised an inquiry, but reformed the next day, prompting the withdrawal of the troops to Castle Island. Eight soldiers, one officer, and four civilians were arrested and charged with murder. Defended by Patriot lawyer John Adams, six of the soldiers were acquitted, while the other two were convicted of manslaughter and given reduced sentences. The sentence that the men guilty of manslaughter received was a branding on their hand. Depictions, reports, and propaganda about the event, notably the colored engraving produced by Paul Revere (shown at right), further heightened tensions throughout the Thirteen Colonies. The event is widely viewed as foreshadowing the outbreak of the American Revolutionary War five years later.

Boston (pronounced /ˈbɒstən/ or locally /ˈbɔstən/ ( listen)) is the capital of and largest city in Massachusetts, and is one of the oldest cities in the United States. The largest city in New England, Boston is regarded as the unofficial "Capital of New England" for its economic and cultural impact on the entire New England region. The city proper, covering only 48.43 square miles, had a population of 617,594 according to the 2010 U.S. Census. Boston is also the anchor of a substantially larger metropolitan area called Greater Boston, home to 4.5 million people and the tenth-largest metropolitan area in the country. Greater Boston as a commuting region is home to 7.6 million people, making it the fifth-largest Combined Statistical Area in the United States.

In 1630, Puritan colonists from England founded the city on the Shawmut Peninsula. During the late 18th century, Boston was the location of several major events during the American Revolution, including the Boston Massacre and the Boston Tea Party. Several early battles of the American Revolution, such as the Battle of Bunker Hill and the Siege of Boston, occurred within the city and surrounding areas. Through land reclamation and municipal annexation, Boston has expanded beyond the peninsula. After American independence was attained Boston became a major shipping port and manufacturing center, and its rich history now helps attract many tourists, with Faneuil Hall alone attracting over 20 million every year. The city was the site of several firsts, including America's first public school, Boston Latin School (1635), and the first subway system in the United States (1897).

John Adams (October 30, 1735 (O.S. October 19, 1735)  – July 4, 1826) was an American Founding Father, and the second President of the United States (1797–1801). He was also a lawyer, statesman, diplomat, political theorist, and a leading champion of independence in 1776. Hailing from New England, Adams, a prominent lawyer and public figure in Boston, was highly educated and represented Enlightenment values promoting republicanism. A Federalist, he was highly influential and one of the key Founding Fathers of the United States.

Adams came to prominence in the early stages of the American Revolution. As a delegate from Massachusetts to the Continental Congress, he played a leading role in persuading Congress to declare independence and assisted Thomas Jefferson in drafting the Declaration of Independence. As a diplomat in Europe, he was a major negotiator of the eventual peace treaty with Great Britain, and chiefly responsible for obtaining important loans from Amsterdam bankers. A political theorist and historian, Adams largely wrote the Massachusetts Constitution in 1780 which soon after ended slavery in Massachusetts, but was in Europe when the federal Constitution was drafted on similar principles later in the decade. One of his greatest roles was as a judge of character: in 1775, he nominated George Washington to be commander-in-chief, and 25 years later nominated John Marshall to be Chief Justice of the United States.