Perhaps we should start with trying to define the subject, so let's try to define what "science and national defense" mean. Science is the organized body of knowledge pertaining to the behavior of the forces, materials and structure of the universe.
Ward, J. Carlton Jr.
"Science as Related to National Defense,"
Naval War College Review: Vol. 11
, Article 2.
Available at: https://digital-commons.usnwc.edu/nwc-review/vol11/iss6/2