The second strategy used by Napoleon I of France when confronted with two or more enemy armies was the use of the central position. This allowed Napoleon to drive a wedge to separate the enemy armies. He would then use part of his force to mask one army while the larger portion overwhelmed and defeated the second army quickly. He would then march on the second army leaving a portion to pursue the first army and repeat the operations (defeat in detail). This was designed to achieve the highest concentration of men into the primary battle while limiting the enemy's ability to reinforce the critical battle. The central position did have a weakness in that the full power of the pursuit of the enemy could not be achieved because the second army needed attention. Napoleon used the central position strategy during the Battle of Waterloo.