A military vehicle is any vehicle for land-based military transport and activity, including combat vehicles; both specifically designed for, or significantly used by military and armed forces. Most military vehicles require off-road capabilities and/or vehicle armour (plate), making them heavy, therefore some have vehicle tracks instead of being wheeled vehicles; and half-tracks have both. Furthermore, some military vehicles are amphibious, constructed for use on land and water, and sometimes also intermediate surfaces. Military vehicles are almost always camouflaged, or at least painted in inconspicuous colour(s). In contrast, under the Geneva Conventions, all non-combatant military vehicles, such as field ambulances and mobile first aid stations, must be properly and clearly marked as such. Under the conventions, when respected, such vehicles are legally immune from deliberate attack by all combatants. Historically, militaries explored the use of commercial off-the-shelf (COTS) trucks and vehicles, both to gain experience with commercially available products and technology, and to try to save time in development, and money in procurement. A subtype that has become increasingly prominent since the late 20th century is the improvised fighting vehicle, often seen in irregular warfare. Military trucks
A military truck is a vehicle designed to transport troops, fuel and military supplies to the battlefield, through asphalted roads and unpaved dirt roads. Several countries have manufactured their own models of military trucks, each of which has its own technical characteristics. These vehicles are adapted to the needs of the different armies on the ground.
Zolpidem has also been studied in persistent vegetative states with unclear effect. A 2017 systematic review concluded that while there is preliminary evidence of benefit for treating disorders of movement and consciousness other than insomnia (including Parkinsons disease), more research is needed. More recent research has found zolpidem treatment to be effective in the short term, but only in a small proportion of cases (estimated at around 5%) and only when the brain injury is of a specific type. Tolerance to the beneficial effects also develops rapidly, and so for these reasons while zolpidem may sometimes be used as a "last resort" treatment, it has numerous disadvantages and research continues into novel treatments that might provide the same kind of benefits in a larger proportion of patients, and with a more sustained benefit.Animal studies in FDA files for zolpidem showed a dose dependent increase in some types of tumors, although the studies were too small to reach statistical significance.