Jìzhě qīnlìle zhànzhēng qiánxiàn de cǎnliè chǎngjǐng.
The journalist witnessed firsthand the brutal scenes on the front lines of the war.
Tips
usage
亲历 emphasizes that the subject personally went through the experience, not just heard about it. It is stronger than 经历 (to experience) in conveying direct, first-person involvement.