The war in Ukraine has underscored the growing geopolitical interdependence between the Euro-Atlantic and Indo-Pacific regions. For one, China has helped Russia cushion Western economic and political pressure. Indeed, Beijing’s image in Europe (which has been on a downward trajectory for years) has tanked as the perception of tacit support for Moscow’s assault on the Euro-Atlantic security order and global norms has spread. Conversely, diplomatic, economic and military support from Indo-Pacific partners like Australia, Japan, New Zealand and the Republic of Korea has helped to strengthen Ukraine’s resilience and uphold global norms. More broadly, the war has triggered an intense debate in the United States about how to reconcile the need to assist Ukraine while maintaining focus on the threat that China poses in the Indo-Pacific. This debate continues to raise questions about the implications of U.S. prioritisation for transatlantic relations and European security.