After the fall of the Soviet Union, Ukraine found itself in possession of a substantial nuclear stockpile. However, due to financial constraints and geopolitical concerns, Ukraine made the decision to give up its nuclear weapons. The 1994 Budapest Memorandum provided security assurances to Ukraine, but these guarantees were called into question when Russia annexed Crimea and backed separatist movements in Ukraine. The current conflict between Russia and Ukraine underscores the security challenges faced by Ukraine in the absence of nuclear deterrence. The vulnerabilities of Ukrainian security have been laid bare, raising concerns about the country’s ability to defend itself effectively. The history of Ukraine’s nuclear disarmament and the subsequent events have significant implications for regional and international security. The need for reliable security assurances and the potential consequences of denuclearization are subjects of ongoing debate and analysis in the context of the Russia-Ukraine conflict.