Rausch is a damage-enabled Sandbox sim, allowing users to do weapons experiments as well as combat without having to worry about cleanup. It was brought online on 01/28/04.
On September 29th, 2005, Rausch was moved from it's prior location north of Jessie and Clyde to the new Combat Regions sims. Rausch now serves as the telehub for the Combat Sandbox - Red Team's HQ and Combat Sandbox - Blue Teams's HQ and a major battlefield between those two sims.
The only other fully damage-enabled Linden owned sim besides Jessie.
Forum Link: Announcement - Ryan Linden announces Rausch being brought online.
Forum Link: Announcement - Pathfinder Linden announces the creation of the Combat Regions.
Jessie - Resident owned combat sim.