The Sixth Fleet's responsibilities to NATO include which of the following?

• A. Oversee cybersecurity operations globally
• B. Deter aggression against NATO members
• C. Provide humanitarian relief
• D. Manage Mediterranean sea lanes

Answer: (B)

Deterring aggression against NATO members is the main way the Sixth Fleet supports the alliance. The fleet operates in Europe and the Mediterranean to project naval power, conduct joint exercises, and keep a ready force, all aimed at preventing potential adversaries from challenging NATO member states. That credible deterrence—showing NATO can respond effectively if needed—is the heart of its responsibilities to NATO.

Other options aren’t central to its NATO role. Cyber oversight is handled by specialized cyber defense commands, not the Sixth Fleet. Humanitarian relief can occur, but it’s not the primary mission tied to NATO. While the fleet helps secure the Mediterranean and supports freedom of navigation, “managing sea lanes” isn’t how NATO assigns its naval responsibilities; the focus is deterrence and defense.