These Language Survival Kits were developed by the U.S. Defense Language Institute.
They are intended to be used as reference guides for deploying service members. They contain “mission-specific vocabulary and simple phrases in topics such as medical terminology, Civil Affairs, Force Protection, and Military Police” with accompanying audio. As such, some of the vocabulary may not be relevant unless you are interrogating a criminal, for instance. Nonetheless, the kits do provide some useful everyday words and phrases. The audio component is also helpful. Please note that some of the files are large and may take a while to download.