How a tiny elite unit enforces Danish sovereignty across 16,000 kilometres of Arctic coastline

Countries & Cities · Published 15 October 2026 Swipe more like this →

In short: In the desolate reaches of Northeast Greenland, an elite Danish naval unit patrols the world's largest national park by dog sled. Operating in pairs for months without human contact, these men maintain a military presence in one of the planet's most unforgiving environments, armed with specialized rifles and unique ammunition.

The Sirius Dog Sled Patrol, or Slædepatruljen Sirius, originated in 1941 as the North-East Greenland Sledge Patrol. Its creation was a strategic response to World War II, specifically designed to detect and neutralize secret German weather stations that provided meteorological data for U-boat campaigns and European air operations. Following a 1933 League of Nations ruling that required Denmark to actively assert its sovereignty over the region to maintain its claims, the unit evolved into a permanent fixture of Danish military presence. Today, it is managed by the Joint Arctic Command and remains the primary authority in the Northeast Greenland National Park.

The patrol's operational reality is defined by extreme isolation and physical endurance. The unit consists of six sled teams, each composed of two men and 11 to 15 dogs. They cover a coastline spanning approximately 16,000 kilometres, relying on a network of over 50 depot huts for survival. Patrolling occurs in two distinct phases: an autumn period from November to December, and a longer, primary season from late January to June. During these months, the teams navigate the Arctic wilderness, often enduring darkness and severe winter storms, with the goal of visiting all areas within a three-to-four-year cycle.

Survival in this environment requires specialized equipment, including firearms capable of stopping dangerous wildlife. Because standard military sidearms proved insufficient against polar bears, the unit adopted the 10mm Auto Glock 20. Patrolmen also carry M1917 Enfield rifles, alternating between armor-piercing rounds for long-range defense against polar bears and hollow-point ammunition for protection against musk oxen. Selection for the unit is rigorous; candidates must have completed compulsory service and undergo six months of training. Despite the intense demands, the unit remains a vital, albeit small, component of Denmark's defense, maintaining stations at locations like Daneborg and Station Nord to ensure a constant, watchful presence in the High Arctic.

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