Introduction: Alliance, Identity, and GeopoliticsRebecca R. Moore and Damon Coletta1. Force Posture after NATO's Return to Europe: Too Little, Too LateJohn R. Deni2. NATO's Return: Implications for Extended DeterrenceSchuyler Foerster3. NATO's Enlargement Policy to Ukraine and Beyond: Prospects and OptionsAndrew T. Wolff4. NATO's Territorial Defense: The Global Approach and the Regional ApproachMagnus Petersson5. Still Learning? NATO's Afghan Lessons beyond the Ukraine CrisisSten Rynning6. European Security at a Crossroads after Ukraine? Institutionalization of Partnerships and Compliance with NATO's Security PoliciesIvan Dinev Ivanov7. The Purpose of NATO Partnership: Sustaining Liberal Order beyond the Ukraine CrisisRebecca R. Moore8. NATO- Russia Technical Cooperation: Unheralded ProspectsDamon Coletta9. The Ukraine Crisis and Beyond: Strategic Opportunity or Strategic Dilemma for the China- Russia Strategic Partnership?Huiyun FengConclusion and Comment: NATO's Ever- Evolving Identity