Projectiles, a leading branch of the Military art Military Architecture, includes Fortification, another branch of that art
I find the emphasis on military education to be somewhat telling about the beliefs and values of the United States during this time period. Today there is no such expectation that all young men must learn about military subjects, but in from the document it seems that there is almost an expectation that most men will eventually serve in the military. It seems that the proximity in time to the revolutionary war, and the value of independence are likely contributing factors to this belief.