Alongside international partners from 23 countries, U.S. cyber operators test their skills and ability to detect enemy presence, expel it, and identify solutions to harden simulated networks during U.S. Cyber Command's CYBER FLAG 21-1 exercise. U.S. Cyber Command’s CYBER FLAG 21-1 exercise, the largest multinational cyber exercise to date, helped more than 200 cyber operators from 23 countries bolster their defensive skills at Joint Base Suffolk, Virginia, from Nov. 15-20. CYBER FLAG 21-1 directly supported national objectives of strengthening the international community of defensive cyber operations and improved the capabilities of the United States and its allies to identify, synchronize, and respond to malicious cyberspace activities.