The <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Bosnian_crisis" id="mwcw" rel="mw:WikiLink" title="Bosnian crisis">Bosnian crisis</a> erupts when <a href="https://en.wikipedia.org/wiki/Austria-Hungary" id="mwdA" rel="mw:WikiLink" title="Austria-Hungary">Austria-Hungary</a> formally annexes <a href="https://en.wikipedia.org/wiki/Austro-Hungarian_rule_in_Bosnia_and_Herzegovina" id="mwdQ" rel="mw:WikiLink" title="Austro-Hungarian rule in Bosnia and Herzegovina">Bosnia and Herzegovina</a>.