The issue of public procurement, particularly in the defence sector, has become especially pressing during the period of Russian aggression in Ukraine. The risk of corruption in this area is significant and can have fatal consequences for the state. The purpose of this article was to review the system for countering and preventing violations in the field of public procurement, which was created in response to the challenges of martial law in Ukraine. A comparison of this system with the corresponding mechanisms of the European Union was conducted. The methodological basis of the article was a dialectical approach to analysing the crime prevention system in the field of public procurement in Ukraine and worldwide. The study employed methods of formal logic, as well as systemic-structural, systematisation, generalisation, forecasting, phenomenological, comparative-legal, and comparative analysis. Scientific approaches to preventing offences in the field of public procurement in several foreign countries were examined, as well as the main rules and standards introduced in the European Union in this field. It was substantiated that the system for preventing offences in the field of public procurement under martial law in Ukraine is not optimal, and this also applies to EU countries, despite the collective international and national measures taken. It was argued that public procurement is inextricably linked with politics and is used as a tool for achieving the strategic objectives of a particular state. The issue of preventing corruption offences in the field of public procurement is extremely relevant for researchers, and the results of its thorough study will enable Ukraine to achieve significant progress in combating this phenomenon, in addition to the measures already taken by the state during martial law