This book offers an introduction to the history and course of the Russian war against Ukraine. Through this book, readers will: - gain data, facts, and a general understanding of Russia’s current war against Ukraine;- understand the connections between history, culture, and politics on the one hand, and Russia's aggression toward its neighbors on the other; - learn about the legal, economic, and humanitarian dimensions of the war;- be able to correctly interpret new developments related to the war; - expand their knowledge of international relations, international law, and the positions of individual states and organizations beyond the current war.The book has a modular structure. Each chapter examines a different aspect of the war.