Rubuta ci gaba don wannan sakin layi - Wani babban yaƙin jirgin ruwa ya faru a 1868; Passage of Humaitá
wanda ya kasance wani aiki na yaki na kogi - mafi muni a tarihin Kudancin Amirka - wanda aka umurci wani karfi na jiragen ruwa na Brazil guda shida da aka ba da umurni da su wuce a karkashin bindigogi na Fortress of Humaitá a kan kogin Paraguay. Wasu 'yan kallo masu ƙwazo sun ɗauka cewa hakan ba zai yiwu ba. Dalilin aikin shine a dakatar da Paraguayans da ke sake ba da sansanin soja ta hanyar kogi, da kuma samarwa da Allies nasara da ake buƙata bayan shekaru 4 na yaƙi mai banƙyama. An yi wannan yunƙurin a ranar 19 ga Fabrairu 1868 kuma ya yi nasara, ya dawo da martabar sojojin ruwan Brazil da kuma ikon mallakar Brazil, kuma ya sa Paraguayans su kwashe babban birninsu Asunción. Wasu marubuta sun yi la'akari da cewa shi ne juyin juya hali ko kuma babban taron yaƙin. An kama sansanin soja, wanda sojojin Allied suka kewaye shi gaba daya a kan ƙasa ko kuma aka kewaye shi da ruwa, a ranar 25 ga Yuli, 1868.