There were a series of battles during the Napoleonic Wars - the most famous are probably the Battle of Trafalgar in 1805 and the Battle of Waterloo in 1815.
Marengo
The only way to transport between Ireland and England in 1800 was by boats and ships.
France invaded Mexico from 1861 until 1867.
Louisiana Purchase
1800 (6 PM)
The Alliance of 1778 between the U.S. and France ended.
A treaty between the USA and France to cease hostilities between each other in the Caribbean
The convention of 1800
The war was undeclared
England. In the early 1800's, England was involved in a war with France and there was a shortage of manpower in England. So, they resorted to stopping American ships and forcing some of their crews into service with them. This was one of the main causes of the War of 1812 between the U.S. and England.
NAPOLEON BONAPARTE became the First Emperor of France in 1800.
The convention of 1800 was a treaty between France and the United States stating the end of any American alliance with foreign countries. Lasted for a century and a half. It was important because it ended the Quasi-War.