Battle of Zarumilla

Zarumilla offensive
Part of the Ecuadorian–Peruvian War

Peruvian bombardment of Arenillas
Date23–31 July 1941
Location
Zarumilla Province (Peru) and El Oro Province (Ecuador)
Result

Peruvian victory:

Territorial
changes
The Peruvian Army and Peruvian Navy occupies Arenillas, Puerto Bolívar, Huaquillas, Santa Rosa and Machala, as well as the rest of El Oro Province
Belligerents
 Peru  Ecuador
Commanders and leaders
Manuel A. Odría Amoretti
Eloy Gaspar Ureta M.
José del Carmen Marín
Manuel Urteaga
Hector Tudela L.
Jesús Polar Valdivia
Luis Rodríguez
Rafael Morán Valverde
Víctor Naranjo Fiallos
Galo Molina 
Carlos Díaz 
Units involved

Peruvian Army

  • Northern Army Detachment:
    • 1st Infantry Battalion
    • 3rd Infantry Battalion
    • 5th Infantry Battalion
    • 19th Infantry Battalion
    • 31st Infantry Battalion
    • 5th Cavalry Group
    • 7th Cavalry Group
    • 6th Artillery Group

Peruvian Air Force

  • 1st Northern Air Force Detachment:

Peruvian Navy

Ecuadorian Army

  • 5th Infantry Brigade:
    • 12th Infantry Battalion Montecristi
    • Cayambe Battalion
    • Tulcan Battalion
    • Guayaquil Battalion
    • Carchi Battalion
    • Sucre Battalion
    • Huaquillas Garrison

Ecuadorian Navy

Strength

Peruvian Army

Peruvian Civil Guard
Peruvian Navy
Peruvian Air Force
Ecuadorian Army
Ecuadorian Navy
Casualties and losses
37+ killed and wounded
1 destroyer damaged
1,334 killed and wounded
200 Ecuadorians captured
1 gunboat damaged
1 boat captured
Several weapons and military equipment seized captured
2 Peruvian civilians killed

The Battle of Zarumilla or Zarumilla offensive was a military confrontation between Peru and Ecuador that took place from July 23 to 31 during the 1941 Ecuadorian–Peruvian War.