Trident Juncture 2015 Trident Juncture 2015 is the largest NATO exercise since 2002 designed to ensure that NATO partners and allies can work together effectively. The exercise involves the NATO Command Structure and is organized in three Host Nations: Italy, Portugal and Spain. The exercise trains NATO's ability to work with international organizations and NGOs to respond to crisis situations. SHARE IMAGE: Download Image: Full Size (0.34 MB) Tags: operation atlantic resolve, Trident Juncture , All images Photo By: DoD graphic VIRIN: 151004-D-TE668-002.JPG Photo Gallery