Complex sentence: The term "stealth" refers both to a broad set of tactics aimed at providing and preserving the element of surprise and reducing enemy resistance and to a set of technologies (stealth technology) to aid in those tactics.
Split into simpler sentences: The term "stealth" refers both to a broad set of tactics aimed at providing and preserving the element of surprise and reducing enemy resistance. It can also be used to describe a set of technologies (stealth technology) to aid in those tactics.