<a href="https://en.wikipedia.org/wiki/Napoleonic_Wars" id="mwgg" rel="mw:WikiLink" title="Napoleonic Wars">Napoleonic Wars</a>: The United Kingdom revokes the <a href="https://en.wikipedia.org/wiki/Treaty_of_Amiens" id="mwgw" rel="mw:WikiLink" title="Treaty of Amiens">Treaty of Amiens</a> and declares war on France.