Dental appliances might be a better alternative
A more straightforward and better alternative that may be useful for military personnel could be a variety of oral appliances. Dental devices involve some plastic devices placed within the mouth to hold it open for proper breathing. These appliances are lightweight, comfortable, and require no electricity. It could be more practical for military use, but are they sustainable?
There are different options for OSA therapy, such as mouthpieces. Other solutions can be surgery to remove excess tissue in the the throat, which is best used in mild to moderate cases.