The overall objective of this study is to conduct an epidemiologic prehospital trauma study in an austere, combat-relevant, foreign environment that innovatively addresses many of the military's current scientific needs, and overcomes limitations experienced by prior US-based prehospital trauma studies. Our primary hypothesis is that a sigmoidal relationship will exist between prehospital time and 7-day mortality. The inflexion point will represent a critical window of time for the patient to reach a trauma facility, after which 7-day mortality rates will accelerate from low to high. This inflexion point will be at 2-hours for non-compressible, and 4-hours for compressible, injuries. Our secondary hypothesis is that there will be non-linear associations between time (from injury to reaching trauma center) with postinjury morbidity endpoints.