After a period of stability, the transatlantic community is facing considerable challenges in maintaining European security. Russia's efforts to destabilize Europe, terrorism, climate change, energy insecurity, migration, fracturing European identity, and the reemergence of nationalist populism challenge the ability of European institutions to perform their central functions. Different visions for Europe's future and the lack of a shared threat perception add to these dilemmas. The U.S. military can help to shape these "friendly force dilemmas" by influencing European actors and institutions, promoting positive change through the U.S. interagency, and providing capabilities to tackle the theater-specific challenges. Related products: Augmenting Our Influence: Alliance Revitalization and Partner Development available here: https: //bookstore.gpo.gov/products/augmenting-our-influence-alliance-revitalization-and-partner-development Harold Brown: Offsetting the Soviet Military Challenge, 1977-1981 available here: https: //bookstore.gpo.gov/products/harold-brown-offsetting-soviet-military-challenge-1977-1981 European Missile Defense and Russia available here: https: //bookstore.gpo.gov/products/european-missile-defense-and-russia International & Foreign Affairs resources collection is available here: https: //bookstore.gpo.gov/catalog/international-foreign-affairs