Sleep late Napoleonic wars affect ourselves for several reasons. One of the first thing Make learning outcomes worse, because we sleep late is that we do not have sufficient rest. To concentrate on studying worse Recognition memory, understanding and creativity can be reduced, which makes learning not stymied education understand slowly. Decided to slow down. Result in efficiency and reduced work.The second cause Make bad health because we sleep late at night will keep the immune system functioning worse body discomfort easier. Unhealthy body. Irregular heart beat and high blood pressure as a result, the work of unusual body.