By the time these arrangements were made, the enemy had arrived within range, nearly in front of the battery.
The messengers and the enemy arrived at the same moment.
"You forget that my enemies may arrive at any minute."
"A blessing it is that the greater enemy has finally arrived!"
It makes a general act to get his defenses in place before the enemy arrives.
Human magic makes it possible for them to know long before an enemy arrives.
They are part of a little outwork the local men began before the enemy arrived.
He didn't need more evidence that the enemy had arrived.
We have a few days until the enemy arrives at Earth.
Go back in time and send my units to the base before the enemy arrived.