Why Lexington Green and Concord Bridge Started a War on April 19, 1775

The most powerful army in the world marched out of Boston in the dark to confiscate some gunpowder, and by sunset it was running for its life from men who had been plowing a week earlier. If a screenwriter pitched that, the studio would say it was too tidy. It happened anyway.

Let me tell you why it happened, because the story is usually told as a skirmish and a poem. It was neither. It was the first collision between a government that wanted the people disarmed and a people who had decided, in advance and in public, that they would not allow it. Everything that matters about the Second Amendment is folded inside the events of one long April day in 1775.

The Background: A Province Already at the Boiling Point

To understand why a column of British regulars was on the road to Concord, you have to go back to 1774. Parliament had answered the Boston Tea Party with the Coercive Acts, which the colonists called the Intolerable Acts. One of them, the Massachusetts Government Act, took the colony's charter apart and put the province under a military governor. That governor was General Thomas Gage, commander of the king's forces in North America, and he now held both the sword and the pen in Massachusetts.

Here is the point I want you to hold on to. The colonists did not begin by arming. They had been armed all along. Every town in Massachusetts had a militia, an institution older than the Crown's standing army in the colonies, and every militia company kept a store of powder, ball and sometimes cannon in a public magazine. The militia was not a hobby. It was how a free colony defended itself, and the king's officers had relied on it in the French and Indian War.

What changed in 1774 was that Gage began to treat the colonists' own stores as a threat to be removed.

The Powder Alarm

On September 1, 1774, Gage sent soldiers to the powder house in what is now Somerville, and removed the provincial powder stored there. They took cannon from Cambridge as well. No shot was fired. But the rumor that blood had been shed spread through the countryside, and thousands of armed men from across New England turned out and started toward Boston before the story could be corrected. The incident is remembered as the Powder Alarm.

Read that sentence again, because it explains the rest of the war. One seizure of powder, with no violence, put thousands of armed men on the road. Gage learned something from it, and so did the colonists. He learned that the countryside would rise if he touched the magazines. They learned that they could rise, fast, and that organization was the thing they lacked.

The colonists organized. The Massachusetts Provincial Congress, meeting outside Boston, called on towns to form companies of men who would be ready at a minute's notice, the minutemen, and told them to drill. It authorized the collection of military stores and moved them inland, away from the reach of the garrison in Boston. Concord, about seventeen miles from Boston by the British route, was one of the depots. In February 1775 Gage tried a raid on Salem for cannon, and the town of Salem, politely and without bloodshed, made sure the regulars came home with nothing. The lesson, again: the colonists were not hiding from the seizure of arms. They were refusing it.

The Orders and the Night of April 18

In the winter of 1775 the government in London lost patience. Letters from Lord Dartmouth, the secretary of state for the colonies, reached Gage in mid-April and pressed him to act against the leaders and the stores. Gage was not looking for a war. He appears to have thought that a quick, quiet strike on Concord would remove the military stores and cow the province. He decided to send about seven hundred men under Lieutenant Colonel Francis Smith, with Major John Pitcairn of the Marines leading the advance companies.

The plan depended on secrecy. It had no chance of keeping it. Boston was full of people who watched the barracks and the boats, and the Provincial Congress had its own sources. Dr. Joseph Warren, one of the patriot leaders in the city, learned that the regulars were about to move and sent word to Paul Revere and William Dawes on the night of April 18. Warren's message was a warning, not a general order, and Revere and Dawes were two of several riders. Revere took the route over water and then by land through Charlestown, with the famous lanterns hung in the Old North Church tower as a signal for those across the river. Dawes went out over Boston Neck by the land route.

They rode to Lexington to warn John Hancock and Samuel Adams, who were staying in the town, and the two were advised to leave. After that, Revere and Dawes, joined by a young doctor from Concord named Samuel Prescott, headed toward Concord. A British patrol stopped them on the road near Lincoln. Revere was captured, Dawes got away, and Prescott, who knew the local lanes, jumped a stone wall and carried the alarm on to Concord. The lone rider is a legend, and the reality is a network. If you want the whole accounting, see Paul Revere Never Shouted the British Are Coming and Six More Revolution Myths. The short version is that three men rode, one was captured, and the alarm spread because dozens of riders and bells and drums carried it from town to town.

That network is the real story. Nobody in Massachusetts needed a hero to wake them up. They had arranged, ahead of time, to be woken up.

Lexington Green: Dawn on April 19

About sunrise on April 19, Smith's advance companies came into Lexington, where Captain John Parker had mustered the local militia on the town green. Parker had roughly seventy to eighty men. He was a farmer and a veteran of the French and Indian War, and by most accounts he was in poor health. He had no illusions about what a few dozen men could do against the leading companies of a regular column. By tradition he told his men to stand their ground and not to fire unless fired upon. I will not give you the famous line in quotation marks, because the sources differ on his exact words and I would rather give you the sense than a polished fiction.

What the sources do agree on is the outline. Pitcairn's officers rode onto the green and ordered the militia to disperse. Parker's men began to leave without laying down their arms, or at least some did. Then a shot rang out. To this day nobody can say who fired it. A volley followed, then a bayonet charge, and when the smoke cleared eight Americans lay dead and about ten were wounded. The regulars lost almost nothing. Then they re-formed, cheered, fired a victory volley and marched on toward Concord.

Pause there. Historians have argued for two and a half centuries about who fired first, and I do not think the argument is the point. The point is that the regulars were on the green at all. The militia had been standing on its own village common, on its own town's land, in front of its own meetinghouse. They were not blocking the road to Concord. They were not holding a fort. They were simply there, armed, as their fathers and grandfathers had been before them, and the Crown's troops ordered them to disperse. When a government tells armed citizens to go home and the citizens decline to be disarmed on their own green, that is the thing the Declaration would later describe in its list of grievances: the keeping of standing armies in time of peace, without the consent of the legislatures.

Concord and the North Bridge

The regulars reached Concord around seven in the morning. By then the town's stores had been hidden, buried or carted off. Smith divided his force. Some companies searched the town, found a few cannon and cannon-carriages and a quantity of wooden items, and burned or broke what they discovered. Other companies went to the North Bridge, which crossed the Concord River, to hold the crossing and send a detachment to a farm beyond it where more stores were rumored.

On the hill across the river, militia companies from Concord and surrounding towns gathered, with Colonel James Barrett in overall command and Major John Buttrick leading the Concord men. They watched smoke rise from the town. It was the burning of the courthouse's property and other items, not the town itself, but from a distance it looked like Concord was on fire. That is when the colonists made the decision that changed the day: they marched down toward the bridge.

The regulars guarding the bridge fired a volley, and the shots killed Captain Isaac Davis of Acton and another Acton man, Abner Hosmer. The militia returned fire, and the volley killed and wounded several regulars and drove the British companies back from the bridge. Ralph Waldo Emerson, writing in 1837 for the dedication of a monument at the spot, put it in the line every schoolchild once memorized:

Here once the embattled farmers stood, / And fired the shot heard round the world.

Emerson was a poet and not a ballistics expert, and a lot of men fired that morning. But he was right about what the moment meant. For the first time, colonists had fired on the king's soldiers under orders from their own officers, as an organized force, and had made them retreat. That is the difference between a riot and a war. A riot has no chain of command. This did.

The Long Road Back to Boston

Smith gathered his troops and began the march back at about noon. He was by then many miles from safety, and the countryside was awake. Militia companies from dozens of towns, hearing the alarm, converged on the road. They did not form lines in the open. They took the fight along the route, firing from behind stone walls, barns, houses and trees, and the column took casualties for the entire way.

This is the origin of the legend that the Americans fought only from behind trees, and the truth is more interesting. They used cover when the ground gave it to them, and they stood in the open when they had to. Mostly they did what any good fighters do: they used the ground. The regulars, marching in a column on a road, were exactly the target the terrain invited.

By Lexington the column was close to breaking. A relief force of about a thousand men under Brigadier General Lord Percy, with two cannon, had come out from Boston and met them there, and the artillery held the militia off long enough for the exhausted men to rest. Then the whole body of regulars marched on to Charlestown under constant fire and crossed to Boston under the guns of the warships. Counting killed, wounded and missing, the British lost somewhere between 270 and 300 men that day, depending on how the missing and captured are counted. The American toll was about 90 to 95. Sources differ on the exact figures, so treat these as round numbers.

By nightfall the militia of Massachusetts was beginning to ring Boston. The siege that followed lasted eleven months. The regulars had gone out to prevent a war, and they had started one.

The Strongest Objection and the Answer

A fair-minded reader will have an objection, and it deserves a fair statement. Here it is, in the form its best defenders would give it.

The objection says: Gage was not trying to disarm the people. He was trying to seize military stores that the Provincial Congress, an illegal body, had gathered in defiance of the Crown. A government has a right to remove stockpiles that are being assembled for rebellion. And the militia, by this account, was not a body of ordinary citizens but an arm of an insurgent government. So Lexington and Concord are a story about a legitimate authority and a rebellion, not about a right of individuals to keep arms.

That is the best case, and it should be taken seriously. Here is the answer, in four points.

1. The stores belonged to the colonists' own institutions. The powder and cannon were held by towns and by the province, under the old charter, for the militia's use. The militia was a lawful institution of the colony long before 1775. Gage was not confiscating contraband. He was confiscating the colony's means of self-defense, in a province whose charter he had just torn up.
2. The seizure was the point. Gage's own repeated raids on powder, from Charlestown in 1774 to Salem and Concord in 1775, show a policy. A government that tries over and over to take the arms and ammunition of a population is not performing an arrest. It is disarming that population, and everyone in Massachusetts understood it that way.
3. The Founders read it that way afterward. When Madison defended the proposed Constitution in Federalist 46, he described "the advantage of being armed, which the Americans possess over the people of almost every other nation." The men who drafted the Bill of Rights had lived through this April. For the full treatment of that passage see Madison's Federalist 46 and the advantage of being armed that tyrants fear. They did not need to be told what an attempted seizure of arms looks like.
4. The Second Amendment answers the objection in its own words. The text reads: "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed." The militia is the example. The right belongs to "the people." In District of Columbia v. Heller (2008) the Supreme Court held that the amendment protects an individual right, and its opinion drew on the history of rulers disarming their political opponents, a history that included the Crown's treatment of the colonists. The same point is argued from the other side in Justice Stevens's Heller dissent, stated fairly and answered point by point, which I recommend because a position is only as strong as the best case against it.

The objection is not foolish. But it fails on its own terms, because the legitimacy it assumes belonged to a government that had suspended the colony's charter and was acting without the consent of the governed. The Declaration, fifteen months later, would put the principle in one line: governments derive "their just powers from the consent of the governed." A power taken without consent is not authority. It is force.

What the Citizen-Soldiers Teach

Let me draw out three lessons, because the history is not a museum piece.

First, preparation beats courage. The minutemen are famous for bravery, but what actually decided the day was organization. They had drilled. They had an alarm system. They had moved the stores. A brave mob would have been slaughtered on Lexington Green. A prepared community was able to chase a column all the way back to Boston. If you take one thing for your own town, take that: liberty is defended by people who showed up to the boring meetings first.

Second, restraint was a strategy. Parker told his men not to start a fight. The colonists understood that who fired first would matter to the opinion of the world, and the provincial authorities collected sworn depositions within days and sent a ship to London to get their account in front of the public before Gage's. They wanted the record to show who was defending and who was attacking.

Third, the seizure of arms is a recurring temptation. I am not suggesting that every proposal about firearms today is a Redcoat column. Many are made in good faith by people who want children safe, and the answer to them is argument, not suspicion. But the pattern has a history, and the history says that when a government's first move in a confrontation is to take what the people could defend themselves with, the people should ask why. That is the habit of mind the Second Amendment asks us to keep.

If you want the next stage of the story, the army that grew out of the militia and the long road through winter, read Valley Forge Was a Winter of Hunger That Turned Farmers Into an Army, and then Crossing the Delaware on Christmas Night and the Ten Days That Saved the Cause. For the document that explains why the colonists thought they were within their rights, see The Grievance List in the Declaration Reads Like a Charge Sheet Against Power.

The Case in Brief

Skip the picture of a lone rider and a poem. Look at the sequence.

1. Gage's policy in 1774 and 1775 was to remove the colonists' powder and cannon, and the Powder Alarm showed that touching the magazines would bring the countryside out.
2. The colonists answered with organization: minutemen, drill, an alarm network of many riders and bells, and stores moved inland.
3. At Lexington Green eight militiamen died, and at the North Bridge the militia fired under orders and drove the regulars back. Those are the marks of a war and not a riot.
4. The retreat to Boston cost the army roughly 270 to 300 men to about 90 for the colonists, and the siege of Boston began that night.
5. The Second Amendment, Federalist 46 and Heller all remember the lesson: an attempted seizure of arms is an act of power against the governed, and a free people keeps the means to say no.

What you can do: read the Second Amendment aloud with your family, then find your town's militia history in the local historical society and visit the green, bridge or common where your own community first stood.