Shìbīng fāshè zhàomíngdàn, zhàoliàng le yèjiān de zhànchǎng.
The soldiers fired a flare, illuminating the nighttime battlefield.
Tips
memory
照明 = illuminate/lighting, 弹 = shell/bullet/projectile. A 'lighting shell' - a projectile that lights up the sky. The characters describe its function perfectly.
