I might have one group devise a siege machine while another comes up with ways to defend against it.

Consists of a castle wall and four siege machines.

Perhaps, I thought, their siege machines were following behind at a slower pace.

Could this be a garbled recollection of a siege machine?

I earned my living with a company of engineers building siege machines.

The Turks were burning their own siege machines and pulling back!

Supplies and siege machines will be kept to the army's rear.

They have mighty siege machines that will break down its walls within a few days.

He was catapulted into the air as if he'd been launched from a siege machine.

It would take an army with siege machines to subdue us.