The aim of the article is to present an outline of the genesis, definition and concept of hybrid warfare in NATO member countries, hybrid activities in the Russian concept of new generation warfare and the impact of hybrid threats on the Polish Armed Forces. The implementation of the above is intended to enable the solution of a research problem in the form of a question: What challenges related to hybrid threats, the main source of which is the expansionist policy of the Russian Federation and the crisis on the Polish-Belarusian border, await the Polish Armed Forces?. The research methods used in the work are observation, document examination, analysis and synthesis. The conflict in eastern Ukraine that started in 2014 and the outbreak of a regular Russian-Ukrainian war in 2022 confirm Russia's willingness to strive to revise the international order in Central and Eastern Europe and regain influence in this region. For this reason, it is expected that all available instruments (both military and non-military) will be used to achieve the above-mentioned goals by the Russian Federation. The second part of the article analyzed the main assumptions of the concept of rebellious wars, the views of I. Kapitaniec, V. Slipchenko, J. Gorbachev, V. Geriasimov and the concept of a new generation war by S. Bogdanov and S. Czekanov, which constitute the theoretical basis for the use of the above-mentioned. resources to implement its strategic assumptions. Therefore, the Polish Armed Forces must be ready to counteract any threats related to such an expansionary policy of a neighbouring country, bearing in mind that hybrid methods are used to blur the boundaries between war and peace, sow doubts in the minds of target populations, and their aim is to destabilize and weaken societies. Preparing the Polish Armed Forces to counteract hybrid threats requires defining challenges and conclusions regarding their ability to respond in the real and information environment.