Before the skirmish took place, the Colombian high command discussed the strategy to take in the Amazonian conflict, choosing to take Tarapacá under General Efraín Rojas' suggestion, instead of Leticia, preferred by General Alfredo Vásquez Cobo.[2]
After concentrating the ships that would make up the Amazonas Detachment in Belén do Pará, they proceeded to sail to the Brazilian town of Santo Antônio do Içá and from there divide the fleet into two: the warships Boyacá and Mosquera continued towards Leticia, while the ships Barranquilla, Córdova and Pichincha continued along the Putumayo River followed by the Nariño as a hospital ship; This maneuver sought to mislead the Peruvian commanders about the true intentions of the attack. Six seaplanes had joined the group under the command of Major Herbert Boy, while General Alfredo Vásquez Cobo went aboard the Córdova to request a meeting with the gunboats Cartagena and Santa Marta, which could not happen because the Putumayo Detachment was carrying out operations in the Güeppi area.[3]
On February 11, 1933, General Alfredo Vásquez Cobo sent a speedboat to Tarapacá with an ultimatum in the hands of Lieutenant Jorge Hernández addressed to Lieutenant Gonzalo Díaz, commander of the Peruvian garrison. The Colombian emissary returned without a written response, but with a verbal response: Lieutenant Gonzalo Díaz stated that he would reject by force any attempted military occupation of Tarapacá.