British Army during the Napoleonic Wars led to the Battle of Trafalgar, a French fleet carrying 6,500 troops briefly captured Dominica and other islands but subsequently withdrew. In 1808, once the British were allied to Portugal and Spain, they were able to concentrate their forces and capture the French possessions one by one; Cayenne and Martinique in 1809, and Guadeloupe in 1810. Haiti was left to the insurgent armies. In 1805 news arrived in London that Napoleon had broken up his invasion camp at Boulogne, and was marching across Germany. The Prime Minister of the United Kingdom William Pitt immediately equipped an army of 15,000 men,
Coalition forces of the Napoleonic Wars as in Germany during the Battle of the Goerhde and the Battle of Leipzig, they were not viewed as being particularly effective. Mostly they effected terror in the enemy troops, who were unfamiliar with this kind of weapon. The French initially thought that the rocket troops were "lancers", as the firing device seemed from a distance to be a lance. At the beginning of the wars the tactics of the allied forces were different from the British tactics. For example, they tried to use the column, but as they almost always lost against the French, they had to develop another