<a href="https://en.wikipedia.org/wiki/Bulgaria" id="mwAUc" rel="mw:WikiLink" title="Bulgaria">Bulgaria</a> and <a href="https://en.wikipedia.org/wiki/Romania" id="mwAUg" rel="mw:WikiLink" title="Romania">Romania</a> sign the <a href="https://en.wikipedia.org/wiki/Treaty_of_Accession_2005" id="mwAUk" rel="mw:WikiLink" title="Treaty of Accession 2005">Treaty of Accession 2005</a> to join the <a href="https://en.wikipedia.org/wiki/European_Union" id="mwAUo" rel="mw:WikiLink" title="European Union">European Union</a>.