Despite the heroic resistance of Ukrainians, in particular the Armed Forces of Ukraine, during the current Russian-Ukrainian war, without effective assistance, especially military, from the Western democratic world, Ukraine would hardly have withstood the Russian aggressor's more than two-year-long large-scale armed invasion and would have been able to preserve national statehood and the Ukrainian nation from genocide and destruction in the event of a protracted war of attrition. For such a war, Ukraine will need at least $150 billion a year, which can only be provided by its Western partners. And the World Bank estimates that over the next 10 years, about $500 billion will be needed to rebuild Ukraine's war-torn infrastructure, which is more than Ukraine's GDP, so without investment and financial assistance from our partners, we will not be able to find these resources in the country either. The purpose of the article is to systematise the huge amount of information available in accessible/open sources about the central, fateful event of modern international relations - Russia's war against Ukraine and the international community's attitude to it, in particular, to highlight the main directions, problems and some preliminary lessons of Western support for Ukraine in its resistance to Russian aggression, which can already be outlined in the third year of the large-scale war. Russia's unprovoked and brutal large-scale armed attack on Ukraine in February 2022 left no choice but to recognise this aggression as an attack on European and Euro-Atlantic democratic values and the fundamental principles on which the United Nations is built. This was a manifestation of the next stage of Russia's global hybrid war against the West. Unprecedented international support for Ukraine and powerful pressure on the aggressor country - Russia - is manifested in active political, financial, military, and humanitarian assistance to Ukraine from EU and NATO member states and other countries. In total, more than 50 countries provide such assistance to Ukraine during the war. However, our Western partners do not yet have a common strategic plan for the Russian-Ukrainian war and its victorious conclusion, and in the third year of the war, they are increasingly talking about different options for peace talks with the aggressor, so Ukraine must develop its own grand strategy, which should be based on the fact that war and peace coexist and that Russia poses a long-term threat to it and the entire democratic world.