During the NATO summit in Wales in 2014 , the alliance decided to conduct several high-profile military exercises in the coming years . Exercise Trident Juncture was one of these exercises , and the first edition was held in Portugal and Spain in 2015 . NATO also decided to conduct a second Trident Juncture , planned to be held in 2018 . The Norwegian government offered to host the exercise , and NATO accepted Norway 's offer in 2015 . The main part of the exercises took place in the central and eastern parts of Norway , in the counties of Trøndelag , Hedmark and Oppland
NATO summit in Wales in 2014
2014 Wales summit
Exercise Trident Juncture 2018