Argentine Confederation
... that Buenos Aires seceded from the Argentine Confederation from 1852 to 1861?
... that <a href="./State_of_Buenos_Aires" id="mwCnI" rel="mw:WikiLink" title="State of Buenos Aires">Buenos Aires</a> seceded from the <b id="mwCnM"><a href="./Argentine_Confederation" id="mwCnQ" rel="mw:WikiLink" title="Argentine Confederation">Argentine Confederation</a></b> from 1852 to 1861?