Key Facts
- Defense line length
- 9.1 km
- Gun platforms on defense line
- 142
- Flanking road length (Chaco side)
- 10.7 km
- Defense line engineer
- Lt. Col. George Thompson (British)
- Year executed
- 1868
Strategic Narrative Overview
Brazilian Marshal Luís Alves de Lima e Silva, Duke of Caxias, recognized that a frontal assault on the Pikysyry line would be costly. He ordered the construction of a 10.7 km road on the Chaco side of the River Paraguay, beginning at Santa Theresa, allowing Brazilian forces to cross and strike the Paraguayan defense line from the rear, bypassing its prepared fortifications entirely.
01 / The Origins
The Pikysyry maneuver arose within the broader Paraguayan War (1864–1870), in which Brazil, Argentina, and Uruguay formed a Triple Alliance against Paraguay under Francisco Solano López. By 1868, Paraguayan forces had constructed a formidable southern defense line along the Pikysyry stream, engineered by British officer George Thompson, with 142 gun platforms over 9.1 km, anchored by the batteries of Angostura on the River Paraguay.
03 / The Outcome
By outflanking the Pikysyry line, Caxias rendered the elaborate Paraguayan defenses untenable, collapsing their southern front. This maneuver opened the path toward Asunción and marked a decisive turning point in the war's final phase, accelerating the collapse of organized Paraguayan resistance and contributing to the eventual Allied capture of the Paraguayan capital.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Luís Alves de Lima e Silva, Duke of Caxias.
Side B
1 belligerent
George Thompson.
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.