For all I know, they're planning to attack my ship next!

They plan to attack our home world and we're trying to protect ourselves.

Which means they still plan to attack in the centre of the wall.

Do you think they plan to attack if we approach?

"Did you find out if they planned to attack again?"

"So why aren't you planning to attack the way he is?"

I could see it if they were planning to attack us there.

"You think they plan to attack us, is that it?"

"How do you know he's planning to attack your world?"

It could mean only one thing, that they planned to attack straight up the hill.