​// The exercise SEABORDER, had its origin in 2008, deriving from two exercises then performed within the 5+5 Defence Initiative, a Portuguese one called “ABLE PROTECTOR " (a LIVEX exercise) and the Spanish one called "Galeón" (a CPX). In order to optimize the participation of the two countries, both decided to make a single joint and combined exercise, involving the two phases, the CPX and the LIVEX.

Presently, each phase takes place alternatively in each country of the 5+5 Defence Initiative.