War and crisis are two abhorrent and unfortunate terms deeply ingrained in the annals of human history. Over the ages, nations have engaged in prolonged conflicts for various reasons and pretexts, resulting in the loss of countless lives both on the battlefield and among civilians. However, viewing war as a tool within the realm of international relations and defense sciences, it becomes evident that the repercussions of military tensions between nations hold immense significance for scholarly research. The specter of war casts a profound and far-reaching crisis upon the nations directly involved and even beyond, leading to diverse cultural, political, economic, and legal ramifications. It's crucial to emphasize that these effects unfold over both short-term and long-term timelines. In the short term, the impact of war on inter-state dynamics is noticeable and often predictable. Conversely, its indirect effects on various aspects of people's lives manifest with delay and prove difficult to control. In recent years, one of the paramount military tensions that plunged the world into an undeniable crisis was Russia's special military operation in Ukraine commencing from February 2022. This operation, having a global scope, bears immense importance for study due to its yet unknown consequences. In the Journal of Countries Studies, the winter issue of the year 1401 was dedicated to a special focus on the crisis in Russia and Ukraine. Among the submissions received, six carefully peer-reviewed articles covering a range of topics were selected for publication.