Military Strategy Territorial Disputes Military Alliances US Involvement International Support International Response US-Russia Relations NATO Relations Territorial Control NATO Expansion Energy Security Political Landscape NATO Involvement NATO's Eastern Flank Western Support International Aid International Alliances Global Alliances Military Engagement Military Presence International Cooperation Foreign Military Involvement Impact on Europe International Sanctions Military Transfers Foreign Troops Involvement Border Regions Foreign Troops Resource Control U.S. Involvement Military Dynamics Military Aid Western Involvement in Ukraine Economic Sanctions European Security Border Security Defense Strategies Military Enhancements Lithuania's Role Territorial Integrity Military Incursions Military Escalation Poland-Russia Relations Poland's Historical Context Military Posturing