Tā duōnián zhēngzhàn shāchǎng, lì xià wúshù zhàngōng.
He fought on the battlefield for many years, earning countless merits.
Tips
usage
征战 is literary and formal, often used in historical contexts. In modern informal usage, it can be applied humorously to non-military competitions or journeys (e.g., 征战职场 — battling it out in the workplace).