Since Russia’s full-scale invasion of Ukraine, Article 5 of the North Atlantic Treaty has been invoked and discussed in every possible context. How exactly should its provisions be interpreted? Is it a guarantee of our security? How exactly is Article 5 of the North Atlantic Treaty worded? Do its provisions guarantee assistance from all members to an attacked ally? Is there any penalty for failing to provide assistance? Is expulsion from NATO possible? To answer these questions, we must first