If military personnel has the opportunity to ordain as a monk, what appropriate topics of the Buddhist teachings should they be taught? What kinds of merit will those who sponsor the ordination ceremony gain?

If military personnel has the opportunity to ordain as a monk, what appropriate topics of the Buddhist teachings should they be taught? And what kinds of merit will those who sponsor the ordination ceremony gain?

From a Barren Field #1

I was not born in time to study with the Great Master. I mainly learned about Dhammakaya Meditation from Khun Yay Ajahn.