Fort Lewis, part of Forces Command, is the home of I Corps. It is one of 15 US power projection platforms. The Corps' primary focus is Pacific Rim. As a result, I Corps has a close, ongoing relationship with Pacific Command. The principal Fort Lewis maneuver units are the 1st Brigade, 25th Infantry Division and the 3d Brigade, 2nd Infantry Division. It is also home to the 593d Corps Support Group, the 555th Engineer Group, the 1st MP Brigade (Provisional), the I Corps NCO Academy, Headquarters, Fourth ROTC Region, the 1st Personnel Support Group, 1st Special Forces Group (Airborne), 2d Battalion (Ranger), 75th Infantry, and Headquarters, 5th Army (West). Soldiers receive first-rate medical care through Madigan Army Medical Center. Located in the beautiful Pacific Northwest on Puget Sound, Fort Lewis is adjacent to McChord Air Force Base, scheduled to be the home of the new C-17 transport fleet. Fort Lewis has abundant high-quality, close-in training areas, including 115 live fire ranges. Additional training space is available at the Yakima Training Center in eastern Washington, including maneuver areas and additional live fire ranges. Population served: Fort Lewis has more than 25,000 soldiers and civilian workers. The post supports 120,000(+) retirees and more than 29,000 family members living both on and off post. Size: Fort Lewis proper contains 86,000 acres; the Yakima Training Center covers 324,000 acres.