“…Upon reviewing the literature, it was found that the theoretical research on civilmilitary cooperation relations in COVID-19 emergency situations is still limited, despite existing studies that have reinforced the potential of the military and the importance of parallel health systems that seek to increase the capacity of the civil health system in times of emergency. An example is the remarkable article by Gad et al [4], who carried out a cross-sectional study in six European countries (i.e., United Kingdom, France, Spain, Italy, Belgium and Sweden), illustrating the impact of the military on the national responses of COVID-19, where, in some cases, there was extensive collaboration between the military and civilian health systems. In reality, the Armed Forces became involved in the response to COVID-19 for two reasons [3]: first, because the pandemic directly affected the Armed Forces' operational readiness and activities; second, because the Armed Forces had a political interest in engaging in the crisis response, showing taxpayers that they are efficient and important to society.…”