Ancient Rome expanded throughout the known world so rapidly and successfully because of numerous wars. Those wars echo in these powerful quotes and sayings.
Bella detesta matribus — Wars, the horror of mothers. (Horace)
Bella gerant alii — Let others wage war
Bellum omium contra omnes — Everyman's war against everyman. (Thomas Hobbes)
Casus belli — Event (that is the justification for, or the cause) of war
Dulce bellum inexpertis — War is sweet for those who haven't experienced it. (Pindaros)
Hannibal ante portas! — Hannibal is at the doors! The enemy/danger is at the doors!
Hostis humani generis — Enemy of the human race
In pace, ut sapiens, aptarit idonea bello — In peace, like a wise man, he appropriately prepares for war
Nervos belli, pecuniam. (Nervus rerum.) — The nerve of war, money. (The nerve of things.) (Cicero)
Nihil tam munitum quod non expugnari pecunia possit — No fort is so strong that it cannot be taken with money. (Cicero)
Nulli expugnabilis hosti — Conquered by no enemy. (motto of Gibraltar)
Post bellum — After the war
Qui desiderat pacem, praeparet bellum — Let him who wishes for peace prepare for war. (Vegetius)
Vix ulla tam iniqua pax, quin bello vel aequissimo sit potior — Scarcely is there any peace so unjust that it is better than even the fairest war. (Erasmus)
Una salus victis nullam sperare salutem — The one safety for the vanquished is to abandon hope of safety knowing there is no hope can give one the courage to fight and win