It is used to describe a member of the military who was killed during a battle.

The king led his troops personally and was killed during a subsequent battle.

As Rinko's older sister, she took over their father's practice after he was killed during a battle.

A few days later they receive news that the Count has been killed during a battle because of a chest wound.

He was killed in action during the Battle of Britain.

His reign of seven years comes to an end when he is killed by Afrasiab during a battle.

He was killed only a few days later during the Battle of Berlin.

He was reportedly killed during a battle in Roulette's casino.

Lange was killed in action during the Battle of Berlin.

Callisto was killed by Storm during a large battle.