Siege machines are one of the enemy types you will face, the other three are Greenskins, Other and Undeads. These are weapons built to help siege a castle and can magically control themselves without any other units operating them.
Types[]
There are currently only two types of siege machines, Catapults and Battle Wagons.
Catapults[]
Large wooden machines that fire high damage rocks at and over your walls.
Siege Wagons[]
Large towering wagons that have very high health, block ranged attacks and restrict your sight. They do not attack.