Establishing a Defensive Strongpoint had hitherto comprised occupying a town or fortress (sometimes a combination of the two) and strongly garrisoning them. The numerical strength of the defenders was considerable thus making it difficult for the besiegers to take them. On the other hand these large concentrations of troops lacked flexibility and could be bottled up by a relatively small number of the enemy. In August 1804, Marshal Berthier – Minister of War – ordered the Marshals Soult, Davout and Ney to commence training their men in a new method of defensive warfare. The concept was simple. First find a building or a complex of buildings in the town or village which could be heavily fortified; the soldiers, under instruction from their military engineers would then commence to make the strongpoint impregnable. The strongpoint would then be garrisoned by elite troops, perhaps a force comprising the combined grenadier companies. The ground in front of the town would be occupied by swarms of skirmisher. Behind the town, concealed from view if possible, would be the remaining infantry and if available, cavalry.
The defense would comprise 3 phases :
The enemy has suffered a reverse but will certainly come back and try again; the same process will take place, reducing step by step the offensive potential of the enemy. This plan will be used very often between 1805 and 1815. Apart from Jungingen, we can mention :