The "Major" at the base camp is wearing the rank of an E-9 and ordering a 1st LT around.
Electromagnetic Pulse (EMP) does not cause circuitry to explode and kill millions of people, as it did in Havana. It fries electronic circuits and kills power grids. Those may cause millions to die, but not from exploding toasters and televisions.
The twin engine aircraft that is crash landed in the beginning is a Metroliner. This is turbine powered and the audio is clearly from a piston engine.