ANDREW JACKSON CHALMETTE BATTLEFIELD 1815 - Battle of New Orleans commemorative medal 

The Battle of New Orleans was an engagement fought between January 8 and January 18, 1815, constituting the final major and most one-sided battle of the War of 1812.   American combatants^] commanded by Major General Andrew Jackson, prevented the British Army,Royal Marines and a large Royal Navy fleet, commanded by Admiral Alexander Cochraneand General Edward Pakenham, from seizing New Orleans as a strategic tool to end the war.

The Treaty of Ghent was signed on December 24, 1814 (but was not ratified by the US Government until February 1815), and hostilities would continue in Louisiana, without knowing about and contrary to the Treaty,  until January 18 when all of the British forces had retreated, finally putting an end to the Battle of New Orleans.