After the disintegration of the Soviet Union, Ukraine found itself in possession of a substantial nuclear arsenal. However, due to financial constraints and geopolitical concerns, Ukraine made the decision to give up its nuclear weapons. The Budapest Memorandum of 1994, which assured Ukraine of security guarantees, was shown to be ineffective when Russia took over Crimea and backed separatist forces within Ukraine. This conflict between Russia and Ukraine underscores the weaknesses in Ukrainian security in the absence of nuclear deterrence. The situation serves as a reminder of the complexities and challenges faced by Ukraine in ensuring its national security. The ongoing tensions between Russia and Ukraine continue to be a matter of international concern, with implications for regional stability and global security. The significance of nuclear disarmament and its impact on national security are issues that continue to be relevant in the context of current geopolitical dynamics.