Factual error: Unfortunately, the most striking scene in this - or any other - film is complete nonsense. During the helicopter attack they play "Ride of the Valkyries" on an ordinary tape deck through two smallish stereo speakers in order to scare the enemy prior to the attack. Okay, let's be clear - helicopters are LOUD. Very, very loud. The enemy would hear a flight of six helicopters approaching from thirty kilometers away. You simply could not play music loud enough to overcome the engine noise of 6 choppers, not without an enormous speaker rig and the power to run it. They are using bog standard home stereo speakers, not the huge bullhorn speakers used later in the war to intimidate the enemy. The music would be barely loud enough to be heard inside the helicopter, let alone outside it. This does not refer to the music playing on the film's soundtrack; Kilgore makes it clear he is playing music from the helicopter and he intends it to be heard by people on the ground.