<a href="https://en.wikipedia.org/wiki/Second_Schleswig_War" id="mwVQ" rel="mw:WikiLink" title="Second Schleswig War">Second Schleswig War</a>: Prussian forces crossed the border into Schleswig, starting the war.<sup about="#mwt42" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-6"}}' id="cite_ref-6" rel="dc:references" typeof="mw:Extension/ref"><a href="./February_1#cite_note-6" id="mwVg" style="counter-reset: mw-Ref 6;"><span class="mw-reflink-text" id="mwVw">[6]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-6"><cite about="#mwt39" class="citation book cs1" id="CITEREFBryan_Perrett2013">Bryan Perrett (November 20, 2013). <a class="external text" href="https://books.google.com/books?id=b8o7BAAAQBAJ&amp;pg=PA73" id="mwBzc" rel="mw:ExtLink nofollow"><i id="mwBzg">Why the Germans Lost: The Rise and Fall of the Black Eagle</i></a>. Pen and Sword. p.<span id="mwBzk" typeof="mw:Entity"> </span>73. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwBzo" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwBzs" typeof="mw:Entity"> </span><a href="./Special:BookSources/978-1-78159-197-0" id="mwBzw" rel="mw:WikiLink" title="Special:BookSources/978-1-78159-197-0"><bdi id="mwBz0">978-1-78159-197-0</bdi></a>.</cite><span about="#mwt39" class="Z3988" id="mwBz4" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Why+the+Germans+Lost%3A+The+Rise+and+Fall+of+the+Black+Eagle&amp;rft.pages=73&amp;rft.pub=Pen+and+Sword&amp;rft.date=2013-11-20&amp;rft.isbn=978-1-78159-197-0&amp;rft.au=Bryan+Perrett&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3Db8o7BAAAQBAJ%26pg%3DPA73&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AFebruary+1"></span></span>