What does Article 5 of NATO stipulate?

Article 5 of NATO is a cornerstone principle of the alliance, establishing a collective defense agreement among its member states. It stipulates that if one member of NATO is attacked, it is considered an attack on all members. This principle underscores the solidarity and mutual defense commitments among members, compelling them to respond collectively to aggression against any member nation. The intent is to deter potential aggressors by presenting a united front, ensuring that all members are prepared to come to the aid of a fellow member under threat.

The other options reflect misconceptions about NATO's purpose and operational guidelines. The stipulation for unanimous consent relates more to decision-making processes rather than collective defense. Similarly, the notion of maintaining a neutral stance contradicts the alliance's defensive posture. The requirement regarding military operations does not align with the core purpose of NATO, which is focused on mutual defense and security cooperation among its members.