Lacking sufficient military forces in America, Napoleon needed peace with the United Kingdom of Great Britain and Ireland to implement the Treaty of San Ildefonso and take possession of Louisiana.

• 由于缺乏足够的军力部署在美洲，拿破仑需要与英国和爱尔兰保持和平，执行圣埃尔德枫索条约，占领路易斯安那。