After the collapse of the Soviet Union, Ukraine inherited a substantial nuclear stockpile. However, due to financial constraints and geopolitical concerns, Ukraine made the decision to relinquish its nuclear weapons. The 1994 Budapest Memorandum provided security assurances to Ukraine, but these guarantees proved to be unreliable when Russia annexed Crimea and backed separatists in Ukraine. The current Russia-Ukraine conflict underscores the security vulnerabilities faced by Ukraine without nuclear deterrence. This situation has raised concerns about Ukraine’s security and the need for stronger international support. The history of Ukraine’s nuclear disarmament and the current conflict with Russia have significant implications for regional security in Eastern Europe. It is essential for Ukraine to navigate these challenges effectively and for the international community to provide the necessary assistance to ensure Ukraine’s sovereignty and security.