This is a list of battles that occurred during the Paraguayan War (1864–1870), also known as the War of the Triple Alliance.
Battle of the Riachuelo – 11 June 1865 Battle of Paso de Mercedes – 11 August 1865 Battle of Paso de Cuevas – 12 August 1865 Battle of Yatay – 17 August 1865 Battle of Pehuajó or Corrales or Itati – 31 January 1866 Battle of Estero Bellaco – 2 May 1866 Battle of Tuyutí or Tuiutí – 24 May 1866 Siege of Uruguaiana or Uruguayana – August/September 1865. Battle of Boquerón – 16 July 1866 Battle of Curuzú – 1–3 September 1866 Battle of Curupayty or Curupaiti – 22 September 1866 Battle of Arroyo Hondo – 3 August 1867 Battle of Tuyú Cué – 11 August 1867 Passage of Curupayty – 15 August 1867 Battle of Tatayibá – 21 October 1867 Battle of Potrero Obella – 28 October 1867 Battle of Tuyutí (second) – 3 November 1867 Siege of Humaitá – November, 1866 until August 1868 Passage of Humaitá – 19 February 1868 Battle of Surubí – 23 September 1868 Battle of Ytororó or Itororó – 6 December 1868 Battle of Avay or Avahy – 11 December 1868 Pikysyry maneuver – 21 December 1868 Battle of Lomas Valentinas or Ita Ybate – 21–27 December 1868, fought in two days. Battle of Piribebuy or Peribebuí – 12 August 1869 Battle of Acosta Ñu or Campo Grande – 16 August 1869 Battle of Cerro Corá – 1 March 1870