U.S. Defense Secretary Ashton Carter, and Germany's minister of defense Ursula von der Leyden, visit troops of the German-Dutch brigade in Munster, Germany, on June 22, 2015. Ashton Carter tells a German think tank audience on June 22, 2015. "We do not seek a cold, let alone a hot war with Russia. We do not seek to make Russia an enemy. But make no mistake: we will defend our allies, the rules based international order and the positive future it affords us all. We will stand up to Russia's actions and their attempts to re-establish a Soviet-era sphere of influence." The NATO readiness effort called "Operation Atlantic Resolve" is designed to meet Russian intervention in Ukraine and preserve the independence of countries in Eastern Europe.