The Siege Shield is an enormous bulldozer blade, larger even than most Dozer Blades, that is used primarily by Space Marine and Chaos Space Marine Mars Pattern Vindicator Siege Tanks. These massive Dozer Blades allow their attached vehicles to shoulder aside battlefield detritus without risk, and offer a high degree of protection from frontal attacks.
Siege Shields differ from regular Dozer Blades not only by their massive size and thickness but because they cover the entire front of the Rhino chassis, with only a view slit for the driver and a reinforced cut-out section for the vehicle's Demolisher Cannon. Siege Shields are used to help the vehicles make their way though terrain that would normally be inaccessible to them, such as the ruins found during urban combat. These blades push aside rubble and dangerous objects such as tank traps and barbed wire.
The Siege Shield can also be found on the rare Land Raider Ares used by the Dark Angels and their Unforgiven Chapters and the uncommon Sabre Tank Hunter. Due to the central placement of the weapons used by the Deimos Pattern Vindicator and Deimos Pattern Vindicator Laser Destroyer they are unable to be outfitted with a Siege Shield, at least according to current Imperial records.
- Codex: Space Marines (7th Edition) - Space Marine Vehicle Equipment
- Codex: Dark Angels (6th Edition), pg. 65
- Codex: Chaos Space Marines (6th Edition), pg. 68
- Codex: Blood Angels (5th Edition), pg. 61