King <a href="https://en.wikipedia.org/wiki/Christian_IX_of_Denmark" id="mwjQ" rel="mw:WikiLink" title="Christian IX of Denmark">Christian IX of Denmark</a> signs the <a href="https://en.wikipedia.org/wiki/History_of_Schleswig-Holstein#The_November_Constitution" id="mwjg" rel="mw:WikiLink" title="History of Schleswig-Holstein">November constitution</a> that declares <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Schleswig" id="mwjw" rel="mw:WikiLink" title="Schleswig">Schleswig</a> to be part of Denmark. This is seen by the <a href="https://en.wikipedia.org/wiki/German_Confederation" id="mwkA" rel="mw:WikiLink" title="German Confederation">German Confederation</a> as a violation of the <a href="https://en.wikipedia.org/wiki/London_Protocol_(1852)" id="mwkQ" rel="mw:WikiLink" title="London Protocol (1852)">London Protocol</a> and leads to the <a href="https://en.wikipedia.org/wiki/Second_Schleswig_War" id="mwkg" rel="mw:WikiLink" title="Second Schleswig War">German–Danish war of 1864</a>.