Complex sentence: Ten sailors were medevaced for injuries sustained in the blast; six returned to the "Roberts" in a day or so, while four burn victims were sent for treatment to a military hospital in Germany, and eventually to medical facilities in the United States.
Split into simpler sentences: Ten sailors were medevaced for injuries sustained in the blast, six returned to the "Roberts" in a day or so. Four burn victims were sent for treatment to a military hospital in Germany, and eventually to medical facilities in the United States.