Thanks again! Your term "military group" made me think of a "Private military company" like the infamous Wagner Group, but I now understand the terrain was acquired by the military themselves, so that applying "landuse=military" seems correct. Are there any signposts to confirm "Area Militare" or such?
As to tagging it as "aeroway=aerodrome", that depends on its actual use. Are aeroplanes or helicopters operating there on a regular base? If so, it could be correct. But if I read you all right, this is only intended future use, not current today.
If there are fixed-wing operations, a runway ought to be given!
If there are infrequent helicopter flights, perhaps add one or more "aeroway=helipad"
If helicopters are based, "aeroway=heliport" would seem best.
And I continue to insist: this is NOT an Aeroporto :) !
