"The most effectual means of securing the peace is being prepared for war."
Other statements like this have been made by Cicero, Aristotle and others.
The earliest was a pre-Socratic philosopher whose name escapes me...
"To secure peace is to be prepared for war." (It's also in a Metallica song entitled "Don't Tread on Me.")
"Si vis pacem, para bellum"
- Vegetius
God Save The Republic!
CGVet58