Lack of a fan belt won't stop your car from starting.
While walking through the field looking for the enemy hideout, a SEAL team member takes a sniff of his MRE and tosses it over his shoulder. All U.S. military combat units especially specialized units take their garbage with them in order to reduce the ability of the enemy to locate them. This method is called "Noise, Light, Litter discipline".
In Bosnia, neither any of the military personnel nor anybody on the Scorpion team is wearing any sort of headgear, despite the fact that they're wearing body armor.