In February 2022, a full-scale Russian-Ukrainian war began, reshaping strategic thinking about how future combat operations might be conducted. The ongoing armed conflict has prompted a reassessment of the methods used to provide battlefield care. Lessons from the Ukrainian theatre of operations may be also used to develop medical equipment and determine the scope of training of both soldiers and medical personnel. Most data on casualties, including the primary causes of preventable injuries and deaths, remain classified. This makes it significantly difficult to collect and interpret research data and draw conclusions. A position paper entitled “War in Ukraine: TacMed Lessons Identified. International Legion Medical Service: Proposal of changes”, published by the Medical Service of the 1st International Legion of the Armed Forces of Ukraine, which discusses the conclusions drawn from the Russian-Ukrainian conflict regarding battlefield medicine training and equipment, is the main source of data.