May 18, 1803
The Peace of Amiens was signed on March 25, 1802, in an attempt to end the hostilities between Britain and France that had arisen during the French Revolutionary Wars. However, this peace agreement was short-lived. The British government refused to return some of France's colonial possessions, which was stipulated in the treaty, causing deep-seated tensions between the two countries. Additionally, Britain was alarmed by France's and especially Napoleons' ambitions and behaviour, further escalating the tension. This eventually led to the start of the Napoleonic Wars around May 18th, 1803.