HistoricSiteMarkers
American Revolution

Map of Charlestown & Boston, 1775–1776

Somerville, Middlesex County, Massachusetts

Marker Inscription

Map of Charlestown & Boston: 1775-1776 Depicting military fortifications of the siege & hills in the landscape

The Story

In 1775 and 1776 the hills around Charlestown and Boston bristled with earthworks as the Siege of Boston opened the Revolutionary War. This map recalls the fortifications thrown up across the landscape—including the heights where the Battle of Bunker Hill was fought—while colonial forces hemmed in the British-held town. The ground it depicts is now Somerville and its neighbors, though the ridgelines that shaped the siege remain.

Why it matters

The siege was one of the Revolution's first campaigns; its end in the British evacuation of Boston proved that colonial forces could stand against a professional army.

The story behind this marker

AI context

The era

In 1775 and 1776, the hills and shorelines around Boston became the opening theater of the American Revolution. After the first shots at Lexington and Concord, thousands of New England militia converged on the area and hemmed in the British army holding Boston, beginning the long standoff known as the Siege of Boston.

The ground this map depicts — Charlestown and its surrounding heights, now part of Somerville and its neighbors — was strategically vital. Whoever controlled the ridges and hills overlooking the town and harbor held the advantage, and both sides understood it. The landscape itself, its hills and vantage points, shaped the entire campaign.

A map of this terrain is therefore more than a picture. It records a moment when ordinary New England high ground was suddenly reckoned in terms of fortifications, fields of fire, and the fate of a rebellion.

People & events

The most famous episode on this ground was the Battle of Bunker Hill, fought on the heights above Charlestown in the summer of 1775. Colonial forces threw up earthworks on the high ground overnight, and the British attacked head-on, taking the position only after repeated assaults and severe losses. Though the colonists were driven off, the cost they inflicted stunned their opponents.

The map's emphasis on military fortifications and hills captures what made this landscape matter. Across the siege, both armies dug in, raising earthworks along the ridgelines while colonial forces steadily tightened their grip on the British-held town.

The long standoff ended when colonial forces fortified commanding heights and forced the British to a decision. Rather than face that position, the British evacuated Boston by sea, ending the siege and handing the Revolution one of its first great strategic successes.

Its place in the American story

The Siege of Boston was among the very first campaigns of the Revolutionary War, and its outcome carried outsized meaning. When the British sailed away from Boston, it proved that a gathering of colonial forces could stand against one of the world's most professional armies and prevail — a stunning result at the war's outset.

The fighting on these heights, especially at Bunker Hill, became a lasting symbol of American resolve. The willingness of colonial defenders to hold their ground against determined assaults gave the young cause both confidence and a story it would tell about itself for generations.

That this decisive early landscape lies within today's Somerville and its neighbors is a reminder of how thoroughly the Revolution is woven into ordinary American ground. The ridgelines that shaped the siege still rise beneath the modern streets.

If you visit

A map marker like this rewards you for lifting your eyes from the panel to the land itself. Look for the rise and fall of the terrain around you and try to read the hills the way the armies of 1775 did — as high ground worth fighting for.

The great pleasure here is imaginative. Where you see streets and rooftops, the map asks you to picture earthworks along the ridges and a besieged town in the distance. Take a moment to orient yourself to the heights the inscription describes.

This spot fits naturally into a broader tour of Revolutionary-era sites around the Boston area, tying the well-known landmarks to the wider ring of high ground that made the siege possible. Give yourself time to stand, look around, and let the eighteenth-century landscape surface beneath the modern one.

Written by AI to add context, grounded in the marker’s inscription and the historical record. The inscription above is the original, unaltered text.

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Related events

  • · Siege of Boston
  • · Battle of Bunker Hill

Themes & tags

American RevolutionMemorial

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