the man needs to understand that there is an airfield there.
Certainly there is now a good modern airfield which is defended by a variety of very smart bullets (on the ground and in the air) each one of which can be expected to do its job.
However a limited supply of very smart ammo can only deal with a limited amout of incoming. It's called the numbers game. After those bullets are used it is game over and you are no longer defending but trying to work out how to retake.