Enemy troops are approaching our position.

He experienced his first encounter with the enemy on the battlefield.

He encountered the enemy on the battlefield.

He moved agilely to avoid the enemy bullets.

The enemy aircraft invaded our airspace.

We are ready to invade enemy territory.

We are conducting training to devise strategies against hypothetical enemies.

He took up the holy sword and fought against the forces of darkness.

After he obtained the cursed sword, he was plagued with misfortune.

He was swinging a machete around.