In short
On April 19, 1775, British regulars and American colonist militias clashed in Lexington and Concord, Massachusetts, marking the first military engagement of the American Revolutionary War. What started as a British attempt to seize stored weapons and arrest colonial leaders escalated into running battles across Middlesex County, leaving over 270 casualties and shattering any remaining hope for peaceful reconciliation.
How it unfolded.
The five-minute version
What actually happened.
The Battles of Lexington and Concord on April 19, 1775, were the first major military actions between the British Army and Patriot militias from British America's Thirteen Colonies during the American Revolutionary War. The opposing forces fought day-long running battles in Middlesex County in the Province of Massachusetts Bay, in the towns of Lexington, Concord, Lincoln, Menotomy, and Cambridge.
As it was happening
11 voices, 53 days.
One beat at a time. Click any dot on the timeline to jump, press play for autoplay, or use the arrow keys to step.
British mobilization
700 British regulars under Lieutenant Colonel Francis Smith depart Boston at night to march on Concord and seize colonial weapons and supplies.
Voices from this moment (1)
British mobilization
Apr 18
“700 British regulars under Lieutenant Colonel Francis Smith…”
As it was happening
11 voices, 53 days.
Day 0 · April 18, 1775
British mobilization
700 British regulars under Lieutenant Colonel Francis Smith depart Boston at night to march on Concord and seize colonial weapons and supplies.
“700 British regulars under Lieutenant Colonel Francis Smith…”
- British mobilization, Apr 18
Day 1 · April 19, 1775
Paul Revere rides
Revere crosses the Charles River and rides toward Lexington to warn colonists; Samuel Adams and John Hancock are sheltering there.
Day 1 · April 19, 1775
Lexington confrontation
Captain John Parker's militia of roughly 70 men assembles on Lexington Common. The British column arrives at dawn; a shot is fired—the identity of the shooter remains disputed—and fighting erupts, killing 8 Americans.
Day 1 · April 19, 1775
Concord bridge battle
Roughly 400 colonial militia engage British forces at the North Bridge in Concord, killing 3 British soldiers. The British retreat and abandon efforts to fully search for weapons stores.
Day 1 · April 19, 1775
Running battles
As British regulars march back toward Boston, militia fire on them from behind walls and buildings throughout Middlesex County. Reinforcements swell militia ranks to several thousand.
Day 1 · April 19, 1775
Retreat to Boston
British forces reach Charlestown by afternoon, having suffered over 70 casualties. The militia lay siege to Boston, effectively trapping the garrison.
“BLOODY BUTCHERY OF THE BRITISH TROOPS”
- The Massachusetts Spy, Apr 20
“OPEN WARFARE BETWEEN BRITISH AND COLONISTS IN MASSACHUSETTS”
- The Pennsylvania Journal, Apr 27
“MILITIA AND REGULARS CLASH IN MASSACHUSETTS - MINUTEMEN…”
- The Virginia Gazette, May 4
“Captain John Parker's militia of roughly 70 men assembles…”
- Lexington confrontation, Apr 19
“British forces reach Charlestown by afternoon, having…”
- Retreat to Boston, Apr 19
“Revere crosses the Charles River and rides toward Lexington…”
- Paul Revere rides, Apr 19
“Roughly 400 colonial militia engage British forces at the…”
- Concord bridge battle, Apr 19
“As British regulars march back toward Boston, militia fire…”
- Running battles, Apr 19
Day 22 · May 10, 1775
Second Continental Congress convenes
The Congress meets in Philadelphia and begins organizing military forces, moving toward formal independence from Britain.
“DISTURBANCES AT LEXINGTON AND CONCORD - OFFICIAL ACCOUNT…”
- The London Gazette, Jun 10
“The Congress meets in Philadelphia and begins organizing…”
- Second Continental Congress convenes, May 10
The numbers.
3 numbers that anchor the scale.
By the numbers
The countable parts.
British force
0-800 regulars from Boston garrison
Lexington casualties
0 Americans killed, 10 wounded; 1 British soldier wounded
Concord casualties
0 Americans killed; 3 British killed, 9 wounded
Front pages.
3 outlets carried the story: The Massachusetts Spy, The Pennsylvania Journal, The London Gazette.
Media coverage
What the world was reading.
4 pieces, ranked by how much they shaped the discourse.
The Massachusetts Spy
Newspaper · Massachusetts, British America · Apr 20, 1775
"BLOODY BUTCHERY OF THE BRITISH TROOPS"
Synthesized from period reporting - A full account of the skirmish at Lexington and subsequent pursuit to Concord, wherein the regulars fired upon the militia without provocation, killing eight minutemen on the Common and wounding many more in running battles throughout the day.
- Apr 27, 1775
The Pennsylvania Journal
Newspaper · Pennsylvania, British America
"OPEN WARFARE BETWEEN BRITISH AND COLONISTS IN MASSACHUSETTS"
Synthesized from period reporting - Reports from Worcester and Boston confirm that armed conflict has erupted in earnest, with hundreds of militia engaging redcoat regulars in pitched battles near Boston, marking the commencement of hostilities that many feared inevitable.
- Jun 10, 1775
The London Gazette
Newspaper · Great Britain
"DISTURBANCES AT LEXINGTON AND CONCORD - OFFICIAL ACCOUNT FROM GENERAL GAGE"
Synthesized from period reporting - General Thomas Gage reports to the Crown that armed rebels assembled in Massachusetts and fired upon His Majesty's troops, necessitating military response to suppress the unlawful insurrection and restore order in the Province.
- May 4, 1775
The Virginia Gazette
Newspaper · Virginia, British America
"MILITIA AND REGULARS CLASH IN MASSACHUSETTS - MINUTEMEN ENGAGE BRITISH FORCES"
Synthesized from period reporting - Accounts from Massachusetts detail a day of combat wherein local militia companies turned out at dawn to confront British regulars marching to seize colonial military stores, resulting in casualties on both sides and galvanizing patriot sentiment across the colonies.
Captured in time.
Captured before it changed
The web as it looked, the day it happened.
Wayback Machine snapshots of the pages people actually loaded that day. Click any card to open the archive at full size.
Sources & citations.
Sources
Where this came from.
Every claim on this page traces to a public, license-clean source. We don't asterisk well.
Wikipedia
1 source- 1.Battles of Lexington and Concord
en.wikipedia.org