INTRODUCTION: The technique of resuscitating or supporting inefficient breathing on the battlefield can be carried out using the soldier's mask. However, carrying out this activity by one rescuer requires the use of the appropriate techniques. The study aims to assess the effectiveness of selected resuscitation methods using mouth-mask ventilation. MATERIAL AND METHODS: The research tool was a Pocket Mask type artificial respiration kit. The study covered the resuscitation technique from behind the patient's head and from the side of the patient, performed by one soldier. The study group underwent standardized training on the application of the package. The parameters were evaluated before the training, immediately after the training and three days after the completed instruction. The statistical T-Student test and Mann-Whitney U test were used to analyze statistical results. All results were considered significant at p <0.05. RESULTS: Significantly higher quality of ventilation from behind the head was shown compared to ventilation from the side of the patient (minute volume: p=0.000; inspiration rate: p=0.015; breath volume: p=0.017) in the long-term assessment. A brief instruction on tactical rescuers can be an effective way to teach ventilation using the Pocket Mask package. CONCLUSIONS: Cardiopulmonary resuscitation conducted by one person from the head method guarantees a higher quality of rescue operations compared to the technique from the side. A brief briefing of soldiers on how to use a ventilation mask can be effective. The Pocket Mask package that is included in the tactical lifeguard is an effective tool for conducting ventilation using the mouth-mask method in battlefield conditions.