The news hadn't gotten there yet, because they didn't have electronic communication.
This battle was ironic because two weeks before the Battle of New Orleans was fought a Peace Treaty was signed in Britain to end the war, but US and British soldiers fighting in America did not find out about it yet. So to put it simply, the Battle was fought after the War had already officially ended.
The battle of New Orleans was fought after the treaty was signed, since news traveled very slowly during that period of time. There were no telephone lines or even telegraph lines. By the time the news crossed the ocean and got to New Orleans the battle was already fought.
There are several battles that fit that description, for a number of different reasons, but in American History, the one that best fits is The Battle of New Orleans in the War of 1812. It was actually fought after the peace treaty had already been signed, but neither army had been informed of that fact.
It was fought after the treaty to end the war was signed.
The Treaty of Ghent had already been signed.
ANSWER The battle was fought two weeks after the Treaty of Ghent, which put to an end the war, had been signed.
The battle of New Orleans, because the Treaty of Ghent had already been signed.
One common misconception about the Battle of New Orleans is that it was fought after the Treaty of Ghent had been signed, officially ending the War of 1812. In reality, the battle took place on January 8, 1815, but the treaty was signed on December 24, 1814, and news of the treaty had not yet reached the United States. Furthermore, the battle had no impact on the outcome of the war, as the treaty had already been agreed upon.
There were only two battles before the Declaration of Independence was signed on July 4th, 1776. They were the Battle of Lexington and Concord and the first major battle of the American Revolution- the Battle of Bunker Hill.
A peace treaty was signed 2 weeks before the battle.
The Battle of New Orleans, fought after the treaty was signed, made Jackson a national hero, and was one of few victories on land.
The Treaty of Ghent had already been signed.