| Conflict: | Orurillo Surprise |
| Partof: | Recapture of Puno in the Peruvian counter-offensive campaign in the Peruvian-Boliivan War |
| Date: | April 3, 1842 |
| Place: | Puno, Peru |
| Result: | Peruvian victory
|
| Territory: | Expulsion of Bolivians from Puno |
| Combatant1: |  Peru |
| Combatant2: | Bolivia |
| Commander1: | Pablo Pimentel Mariano Macedo |
| Commander2: | José Ballivián Juan Landívar |
| Strength1: | 250 men |
| Strength2: | 300 men |
| Casualties1: | unknown |
| Casualties2: | 200 killed 100 captured or executed[1] |
The Battle of Orurillo or Surprise of Orurillo was the last confrontation between the Bolivian occupation forces and Peruvian militias within the framework of the war between Peru and Bolivia in April 1842. The Peruvian victory finally allowed the last Bolivian troops to be expelled from Peruvian territory.
It is concluded that before the conflict situation between Chile and Peru occurred, to raise the patriotic spirit of the southern peoples who always fought for national integrity and sovereignty, the military historical documents were reviewed, finding the Orurillo Surprise and its consequences; Therefore, the Law of January 3, 1879, by President Mariano Ignacio Prado, is dictated and promulgated; which indicates: The town of Orurillo is elevated to the category of “VILLA”, in fair recognition of the valuable actions in defense of the Homeland; thanks to the brave intervention of the soldiers and children of that town, who risked their lives, to whose memories we pay a fair and reverent tribute