Jargon  I found sources defining the three terms tagged as jargon if someone wants to edit them in  a thing called the jitterbug Jitterbugging around trying to surround enemy units with helicopters  squad sized elements These elements had fixed areas of operations comparable to the squares of a checkerboard and once in these areas of operations they moved continuously from one terrain feature to another in order to interdict the enemy more detail  Eagle Flight choppers were loaded with Vietnamese airborne troops who were dropped in to support ground forces at the first sign of enemy contact  image