Source: American RevolutionMassachusetts had been preparing for war with England and this included training troops and stockpiling weapons and ammunition at Concord. When the British found out about this, he ordered troops to seize these supplies before Americans could use them against the English Army. As the British began to move their troops, the Americans found out that the British planned on destroying the weapons as Concord.
The famous "Midnight Ride of Paul Revere" was the warning that Bostonians sent to Concord. In fact, Paul Revere never actually completed his ride as he was captured before arriving at Concord. His cousin William Dawes actually completed the ride and gave the warning.
Somethign interesting from NPR of all places...
How Accurate Were Palin's Paul Revere Comments? : NPR
BLOCK: We are going to fact-check Palin's Paul Revere history now with Robert Allison. He's chair of the history department at Suffolk University in Boston.
Professor Allison, welcome to the program.
Professor ROBERT ALLISON (Chairman, History Department, Suffolk University): Thanks, Melissa.BLOCK: And let's review Paul Revere's midnight ride, April 18, 1775. He's going to Lexington, Massachusetts. And according to Sarah Palin, he's riding his horse through town sending warning shots and ringing those bells. True?
Prof. ALLISON: Well, he's not firing warning shots. He is telling people so that they can ring bells to alert others. What he's doing is going from house to house, knocking on doors of members of the Committees of Safety saying the regulars are out. That is, he knew that General Gage was sending troops out to Lexington and Concord, really Concord, to seize the weapons being stockpiled there, but also perhaps to arrest John Hancock and Samuel Adams, leaders of the Continental Congress, who were staying in the town of Lexington.BLOCK: And Sarah Palin also was saying there that Paul Revere's message to the British in his warning was: you're not going to take American arms. You know, basically a Second Amendment argument, even though the Second Amendment didn't exist then.
Prof. ALLISON: Yeah. She was making a Second Amendment case. But, in fact, the British were going out to Concord to seize colonists' arms, the weapons that the Massachusetts Provincial Congress was stockpiling there.
So, yeah, she is right in that. I mean, and she may be pushing it too far to say this is a Second Amendment case. Of course, neither the Second Amendment nor the Constitution was in anyone's mind at the time. But the British objective was to get the arms that were stockpiled in Concord.BLOCK: So you think basically, on the whole, Sarah Palin got her history right.
Prof. ALLISON: Well, yeah, she did. And remember, she is a politician. She's not an historian. And God help us when historians start acting like politicians, and I suppose when politicians start writing history.
It's frightening to think that this bimbo could have been one heartbeat away from being president. Not only is it frightening but it is telling. McCain wanted a dummy just like when Pappy Bush had Dan Quayle and "President" Cheney had Shrub.
Yet another update on Conservapedia where they have reverted their entry on Paul Revere to what it was pre-Palin's mangling of events...
Paul Revere (1734-1818) was a silversmith in colonial America who was very active in Boston-area revolutionary groups such as the Sons of Liberty. He is famous for riding from Boston to Lexington, Massachusetts with William Dawes on the night of April 18, 1775 to warn the minutemen that British troops led by General Thomas Gage were invading. Revere was captured before he could reach Concord, but managed to escape. His midnight ride was immortalized by a poem by Henry Wadsworth Longfellow. 
Paul Revere - Conservapedia
Interestingly eonough, in the talk page, the Conservative who removed Palin's perspectiive had this to say...
Is it acceptable to have totally fabricated history on conservapedia, just because it differs from the "liberal version of the events"? Here is what Revere said *himself* about his ride: "On Tuesday evening, the 18th, it was observed, that a number of Soldiers were marching towards the bottom of the Common. About 10 o'Clock, Dr. Warren Sent in great haste for me, and beged that I would imediately Set off for Lexington, where Messrs. Hancock & Adams were, and acquaint them of the Movement, and that it was thought they were the objets."
He set out to warn Hancock and Adams, not to affirm the 2nd amendment rights against BigGovernment. Don't we look like fools if we just make things up?
Is Paul Revere really the hill on which we want to tussle over political ideology? I reverted it back to the 2009 entry because it seems silly to sacrifice legitimate history in the name of politics.
Talk:Paul Revere - Conservapedia
Note: "liberal version of the events" = reality (which is what they reverted their page back to).
Not even in Palin's comments about that particular event of Paul Revere's ride is she make a sensible 2nd Amendment case. The stockpiling of weapons was also being done by the British.
Were American colonist trying to protect the British's 2nd Amendment rights on American soil? Of course not. WHY?
IT WAS WARTIME! Opposing sides are protecting their troops and interests by eliminating their opponents weapon arsenals. Gezzz!
Palin is ignorant as hell about a lot of things, but she is truly a Servant when it come to spinning political issues.
Palin's story is as ridiculous as claims by fundamentalist Christians that dinosaurs walked with humans.