Based on the analysis of the military-political and operational situation in the Arctic region, the article reveals the actual and potential threats to the national security of the Russian Federation from the United States and the countries of the NATO bloc. The directions of strengthening the military presence in the Arctic of the Arctic states and other alliance countries are characterised. It is emphasised that the North of Norway is becoming one of the most militarised regions in Scandinavia. It is concluded that the activation of NATO in the High North may lead to a reconfiguration of relations in the security sphere. The article reveals the measures of the Russian Federation to strengthen the defence capability in the Arctic direction, protect its sovereignty and territorial integrity, and normalise the situation and relations between Russia and the United States.