426 • WAR OF 1812
British political activities in Florida and Texas. The result was that
expansionists sought a military campaign that would strengthen their
position in relation to Great Britain. Why not invade Canada, they
argued, expel the British from the continent, and make the United
States safe, peaceful, and secure?
In deciding to send an army to invade Canada in 1812, the U.S.
Congress underestimated both British power in North America and
Great Britain’s determination not to abandon its North American
colonies to the Americans. Congress believed that the Ontario Penin-
sula, so heavily populated with American settlers, would be an easy
conquest, or as Thomas Jefferson put it, “a mere matter of marching.”
To Canadians and Americans alike, the War of 1812 was a re-
newal of an old encounter, and most theaters of war were familiar
ones for generals determining strategy: the Atlantic Seaboard, the
Great Lakes, and Louisiana. In the Atlantic, despite the early frigate
victories that left the American public with feelings of success, the
British navy acquired command of the sea and by 1813 had enforced
a blockade of the coast from Boston to New Orleans. Now the British
could press their advantage, and in 1813 they gave convoy support
to a North West Company expedition to secure the far western fur
trade at the mouth of the Columbia River, where Americans had
been since 1811.
The coastal blockade meant that the Americans would have to at-
tack the British at inland points, and they determined to undertake a
three-pronged, simultaneous attack on Canada. By the Champlain-
Richelieu access, by the Niagara Peninsula, and by Detroit, the
American army was to attack and then march on Montréal and Qué-
bec. But the British and Canadians enjoyed a high degree of success
on the battlefield. Control of the lakes was sometimes in doubt. The
Battle of Lake Erie, in 1813, for example, gave the United States
ascendancy on that lake, but never total control of the Ontario Penin-
sula. Imperial forces conquered Michilimackinac in 1812 and kept it
for the duration. The brilliant feats of Gen. Isaac Brock at the battle
of Queenston Heights had other parallels along the Canadian border.
The ill-trained, badly led American forces suffered some embarrass-
ing defeats. Only at New Orleans, where 10,000 British veterans of
European campaigns led by Edward Pakenham were repulsed by
Andrew Jackson’s forces in January 1815, did Americans enjoy a
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