The All Terrain Defense Pod (AT-DP) was a bipedal Imperial walker, a variant of the AT-ST. It featured a heavily armored head wit a single moble laser cannon mounted beneath its chin, and narrow slits on the right and left sides of the cockpit, from which crewmembers could fire at flanking threats.
The walker was deployed as a police vehicle on planets where rebel unrest seemed probable, as well as patrol missions.
Overall, the AT-DP was quite similar to the All Terrain Advance Raider with which it shared the armored cockpit and central laser cannon.
- Star Wars: Imperial Handbook: A Commander's Guide (First mentioned)