This fortress played a crucial role in the medieval wars.

I am interested in the history of the Middle Ages.

He worked hard to accomplish his goals.

His role is the team leader.

Health is very important.

His opinion is very important.

War takes away many innocent lives.

They waged war against the enemy country.

He received the letter challenging him to a duel and began preparing for the duel.

His role is to fulfill his responsibilities as a leader.