If you want peace, prepare for war
if you want peace, (you must) prepare for war
proverb Being well prepared militarily deters other factions from pursuing violent actions. Sir, I think we need to have more troops ready for action—if you want peace, prepare for war.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
If you want peace, (you must) prepare for war.
Prov. If a country is well armed, its opponents will be less likely to attack it. Wilbur was always arguing with those of his friends who believed in disarmament. "Getting rid of our weapons won't promote peace," he would say. "If you want peace, you must prepare for war."
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.