Northern Viking is an annual NATO exercise held in Iceland. The exercises were held biennially until 2006 when the frequency was increased. The purpose of the exercise is to test the capabilities of Iceland and its NATO allies, as well as increase the readiness of the forces involved and their inter-operability.
Several NATO member states participated in the exercises in 2022. The United States Navy, in a press release, described 2022's exercise as "a hunt for adversary submarines" and "visit, board, search and seizure missions on suspect vessels." [1]
Northern Viking 2011 was held by the Icelandic Coast Guard and the United States Air Forces in Europe (USAFE). Among the training exercises were transport of troops to and from Iceland and air defence. The exercise also tested cooperation of naval and air assets in view of increasing importance arctic operations.
Northern Viking 2008 was held by the Icelandic Defence Agency and the United States European Command (EUCOM). More than 400 foreign troops were deployed to Icelandic bases with aircraft and a Danish warship.
The exercise consisted of an air defence exercise and a maritime defence exercise.
ICG: 1 Ægir-class offshore patrol vessel, 1 helicopter
RDN: 1 Thetis-class patrol vessel 
USN: 2 P-3 Orion ASW aircraftNorthern Viking 2007 was held by the Icelandic MFA Office of Defence and the United States European Command (EUCOM). More than 240 foreign troops were deployed to Icelandic bases with aircraft and a Danish warship.
The exercise consisted of an air defence exercise and an anti-terrorist exercise.
: 15 Víkingasveitin troops, 1 helicopter : 6 Jægerkorpset troops, 1 helicopter
: 16 Latvian Special Tasks Unit troops
: 20 Forsvarets Spesialkommando (FSK) troops
The Boeing KC-135 Stratotanker is an American military aerial refueling aircraft that was developed from the Boeing 367-80 prototype, alongside the Boeing 707 airliner. It is the predominant variant of the C-135 Stratolifter family of transport aircraft. The KC-135 was the US Air Force's first jet-powered refueling tanker and replaced the KC-97 Stratofreighter. The KC-135 was initially tasked with refueling strategic bombers, but it was used extensively in the Vietnam War and later conflicts such as Operation Desert Storm to extend the range and endurance of US tactical fighters and bombers.
The Slovenian Armed Forces or Slovenian Army are the armed forces of Slovenia. Since 2003, it is organized as a fully professional standing army. The Commander-in-Chief of the SAF is the President of the Republic of Slovenia, while operational command is in the domain of the Chief of the General Staff of the Slovenian Armed Forces.
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Iceland's defence forces consist of the Icelandic Coast Guard, which patrols Icelandic waters and monitors its airspace, and other services such as the National Commissioner's National Security and Special Forces Units. Iceland maintains no standing army, the only NATO member for which this is the case.
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