战友 (zhàn yǒu): comrade-in-arms; battle companion

He and I have been old comrades-in-arms since we started training together in the recruit company. Although we were discharged many years ago, we still call each other every Spring Festival.

During the flood relief efforts, the soldiers fought day and night on the levee, forging a deep comradeship-in-arms with one another.

On the day the veteran was discharged, he hugged his comrade-in-arms tightly, tears streaming down his face, and said he would never forget the days they endured hardships together.

Platoon Leader Zhang was wounded while covering his comrades in battle. After the war, he was awarded a first-class merit, and his deeds spread widely throughout the unit.

After retiring from the military, he opened a small restaurant. Former comrades-in-arms often come from various places to gather and reminisce about military life together.