NATO's "Steadfast Duel 2026" exercise tests regional defense plans across Europe and US

NATO's "Steadfast Duel 2026" exercise is currently underway, involving approximately 8,000 military and civilian personnel across Europe and the United States. This computer-assisted command post exercise is designed to test regional defense plans in a simulated conflict, focusing on collective defense under Article 5 and multinational command-and-control structures across various domains.