On 24 February 2022, Russia invaded Ukraine in a major escalation of the Russo-Ukrainian War, which began in 2014. Following the 2014 Ukrainian Revolution, Russia annexed Crimea, and Russian-backed paramilitaries seized part of the Donbas region of south-eastern Ukraine, which consists of Lugansk and Donetsk oblasts, sparking a regional war. In March 2021, Russia began a large military build-up along its border with Ukraine, eventually amassing up to 190,000 troops and their equipment. Despite the build-up, denials of plans to invade or attack Ukraine were issued by various Russian government officials up to the day before the invasion. On 21 February 2022, Russia recognized the Donetsk People's Republic and the Lugansk People's Republic, two self-proclaimed breakaway quasi-states in the Donbas. The next day, the Federation Council of Russia authorized the use of military force and Russian troops entered both territories. This book tries to shed light on the causes which led to this war. It presents arguments of both sides carried through the words of presidents Putin and Zelenskyy. This edition includes as well the book about the historical background of the conflict and the military actions during the war. Content: The Speeches and Decisions of Vladimir Putin The Speeches and Decisions of Volodymyr Zelenskyy The Consequence: Russo-Ukrainian War