I find this unbearably sad.
Taken on a truck to a helicopter for a training exercise, rapelling down ropes in a military exercise area. Then when in the air, told that instead they have to capture an airfield in a neighbouring foreign country, no other details.
When they get out, after being shot at on the way in so they know this isn't some kind of joke, their officers have no idea what the objective is. Stay here and dig, near a runway, and wait for supplies an equipment.
Then the air attacks begin.. first chapter of a week long nightmare.