European defense cooperation took center stage at the Atlantic Future Forum in Oslo as Russia renewed calls for changes to the continent’s security arrangements during US-mediated peace negotiations over Ukraine. The November 11–12 gathering, held aboard Britain's HMS Prince of Wales aircraft carrier, focused on how European allies can assume greater responsibility for defense. Moscow wants discussions about ending its war in Ukraine to address NATO’s military presence in eastern Europe. Its proposals seek restrictions on forces deployed to countries that joined the alliance after 1997, including Poland and the Baltic states. European officials have resisted giving Russia a say over NATO deployments. Estonia’s foreign minister warned last week that Europe must be involved in decisions affecting its security. US, Ukrainian and European representatives reiterated this week that NATO would remain central to collective defense. Talks in Abu Dhabi ended without agreement on the main disputes, leaving security negotiations unresolved.