The main phase of a large-scale NATO exercise called Steadfast Dart 2026 began last week. This exercise, billed as the alliance’s largest for the year, involves more than 10,000 troops from 11 NATO nations. The focus of the military exercise is Northern Europe and the Baltic Sea region, an area that has become more contentious since Russia’s invasion of Ukraine and the subsequent accession of Finland and Sweden to the alliance. The exercise also comes at a time when transatlantic relations have been strained over issues such as trade disputes and American calls to annex Greenland.