COPENHAGEN, Denmark (AP) — NATO's biggest military maneuvers since the Cold War have started in Norway in a hypothetical scenario that involves restoring the Scandinavian country's sovereignty after an attack by a "fictitious aggressor."

Russia, which shares a border with Norway, was briefed by NATO on the Trident Juncture 2018 drill and invited to monitor it, but Moscow is still angered by the exercise. Russia's defense minister had warned that Moscow could be forced to respond to increased NATO activity near its western border.

The wargames launched Thursday bring together around 50,000 personnel from all 29 NATO allies, plus partners Finland and Sweden. Around 65 vessels, 150 aircraft and 10,000 vehicles will participate.

The drill, scheduled to end Nov. 7, takes place in central and eastern Norway, the North Atlantic and the Baltic Sea.