Determining the level of functionality is important to define a suitable rehabilitation treatment. In the literature reviewing no studies that describe the functionality in Military Trauma patients were found. Materials and Methods: A prospective study was performed, patients valued by trauma group of Hospital Militar Central who have suffered military trauma between September 21 to December 21 2015 were included, the FIM scale was performed within the first 72 hours of hospitalization, later, were followed weekly. Results: a total of 194 patients, the majority were young men. The main causes of admission were accidents, followed by injury in combat and accident. The most frequent mechanisms of trauma were firing long-range weapon, falls and motorcycle accidents. The most common diagnoses were fractures and dislocations of the lower limbs. The category of transfer presents greater commitment, followed by ambulation. As for the categories of Social and Communication, in general did not show a strong commitment. When comparing the initial value with prior to hospital discharge, a statistically significant functional improvement in the vast majority of items found. Discussion: The main diagnoses were fractures and luxations of the lower limbs, so it is not surprising that the categories had higher functional compromise were the Transfer and ambulation. Burns produced a greater commitment to self-care, while traffic accidents affecting more bowel and bladder control, transfers and ambulation. The relationship between initial FIM and duration of hospitalization was weak, which makes us think that there may be many other factors influencing this point and is not reviewed in this study. Conclusions: The determination of the degree of functionality is important for rehabilitation programs. A major constraint on the ability to ambulation and transfers was evident due to the large number of luxo-fractures in lower limbs. Patients tended to improve its functionality which was statistically significant. It is considered that the results have shown a great internal validity, but it is not possible to extrapolate these results to the general population, for which further research is required.