Fact-checking claims that NATO, US broke agreement against alliance expanding eastward

No legal agreement prohibits NATO from expanding eastward. Russians have argued that comments made by U.S. and other Western leaders during the negotiations over the reunification of Germany constituted a promise that NATO would not extend beyond then-East Germany. Those allegations have sparked decades of debate amongst those involved in the events, and scholars studying them. Even scholars who say they believe western powers did offer the Soviet Union assurances about NATO expansion say Owens' claim is misleading. Our ruling Owens said, "NATO (under direction from the United States) is violating previous agreements and expanding eastward." There is an ongoing historical debate over comments that Western leaders, including Baker, made during post-Cold War negotiations, and whether what they said amounted to assurances that NATO would refrain from welcoming in countries closer to modern-day Russia. But NATO as an organization made no such pledge, and the formal agreement signed at the end of those negotiations said nothing about the alliance not expanding eastward. We rate this claim Mostly False.