NET
17 Pharaoh with his great army and mighty horde will not help him in battle, when siege ramps are erected and siege walls are built to kill many people.
Darby
17 Neither shall Pharaoh with a mighty army and a great assemblage do anything for him in the war, when they cast up mounds and build forts to cut off many persons.
KJV
17 Neither shall Pharaoh with [his] mighty army and great company make for him in the war, by casting up mounts, and building forts, to cut off many persons: