Carol I of Romania, through his Prime Minister Ion I. C. Brătianu, had also secretly pledged to support the Triple Alliance, but he remained neutral since Austria-Hungary started the war.
Carol I i Rumænien, gennem hans premierminister Ion I.C. Brătianu havde også i al hemmelighed lovet at støtte tripelalliancen, men også han forblev neutral, da Østrig-Ungarn startede krigen.