Si vis pacem, para bellum
“If you want peace, prepare for war.”
After Vegetius, De re militari 3, prologue
What does “Si vis pacem, para bellum” mean?
Si vis pacem, para bellum translates as “If you want peace, prepare for war.”
Peace is best protected by being strong enough that no one dares to attack. Today it is quoted in debates about defence, deterrence and being prepared.
“Si vis pacem, para bellum” word by word
| Latin | English | Grammar |
|---|---|---|
| Si | if | conjunction introducing a condition |
| vis | you want | second person singular present indicative of volo, “I want, wish”; an irregular verb whose forms (volo, vis, vult) must be learned by heart |
| pacem | peace | accusative singular of pax, “peace”; direct object of vis |
| para | prepare! | singular command (imperative) of paro, “I prepare”; addressed to one person. To a group: parate |
| bellum | war | accusative singular of bellum, “war”; neuter noun, direct object of para |
How to pronounce “Si vis pacem, para bellum”
The differences are si (see or si), vis (wees or vees) and pacem, where classical has a hard k and church Latin has ch. Stress falls on the first syllable of pacem, para and bellum.
The story behind it
Word for word the line reads “if you want peace, prepare war”. Latin simply puts the command para next to its object bellum, and English adds “for”.
The short form is modern. It condenses a thought from Vegetius, a late Roman writer who wrote the military handbook De re militari. In the prologue to his third book he advises that whoever wants peace should prepare for war.
Vegetius wrote in Late Antiquity, long after Rome’s great conquests, and his book looks back at how a disciplined army had once been built and kept. The maxim lives on in debates about defence and deterrence, and it also gave the name Parabellum to a well-known pistol cartridge and to a German arms company.
How to use “Si vis pacem, para bellum”
It suits a desk motto, a caption for a photo of training or discipline, or a tattoo for someone who values readiness and strength. It also fits an essay or speech on deterrence, defence policy or being prepared for trouble.
- Latin
- Si vis pacem, para bellum
- English
- If you want peace, prepare for war.
- Source
- After Vegetius, De re militari 3, prologue
- Era
- Late Antiquity
- Theme
- Strength
Common mistakes
- The popular short form is not a direct quote. Vegetius wrote a longer sentence in De re militari, and the compact version is a later condensation.
- It does not praise war. The point is that visible strength discourages attack and so protects peace.
- The imperative para is singular. Speaking to several people, use parate bellum.
- Do not confuse bellum, “war”, with bellus, “beautiful”. They are different words, and a misspelling can change the meaning.
Questions about “Si vis pacem, para bellum”
What does “Si vis pacem, para bellum” mean literally?
“If you want peace, prepare war.” English normally says “prepare for war”, since the Latin leaves the “for” unstated.
Who said “Si vis pacem, para bellum”?
The idea comes from Vegetius, De re militari 3, prologue. The short Latin form is a later condensation of his words, not his exact sentence.
How do you pronounce “Si vis pacem, para bellum”?
Classical: see wees PAH-kem PAH-rah BEL-loom. Church Latin: see vees PAH-chem PAH-rah BEL-loom. In both, stress the first syllable of pacem, para and bellum.
Is “Si vis pacem, para bellum” correct Latin for a tattoo?
Yes. The grammar is sound: a condition with si, then a singular command. It addresses one person, so it works for a personal motto.
More to explore
Translation and grammar checked by Latin Quoter · last reviewed November 2026
Latin remixes of Si vis pacem, para bellum
4 playful twists, e.g. Si vis pacem, para cibum · Si vis pacem, para vinum · Si vis pacem, para crustula.
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