Je was op zoek naar: battle hardened (Engels - Latijn)

battle
proelium

battle mage
quod etiam magi faciunt opus proelium

war/battle
belli

battle creek
aestuarium

life is a battle
vita in pugna

like a battle-line
velut acies

the battle for wesnoth
proelium pro vesnote

when he won the battle,
in proelio vicit

prepare yourself for battle
praepara te ad proelium

the battle having been joined
proelio commisso

hardened by age, of long-standing
inveteratus

pugna, pugnae battle, fight;
pugna

strictura, stricturae hardened mass of iron;
strictura

keenness, edge, sharpness, battle-line, battlefield
acies

campitor, campitoris charger, battle-horse, war horse;
campitor

choose your battles wisely
elige tibi proeliis