From the Bureau of Land Management:
The Marine Corps recently notified BLM of their plans to utilize the Johnson Valley Shared Use Area for military training from August 1-30, 2016, and of the associated temporary closure. BLM is working with the Marines to address issues associated with this military training/closure, and to keep the public informed.
BACKGROUND: On December 26, 2013 the National Defense Authorization Act of 2014 (NDAA) was signed into law, authorizing the Marine Corps to occupy the Johnson Valley Shared Use Area (SUA) for two 30-day periods annually during which time the area would be closed to the public. See attached Johnson Valley Subregion map.
On this date in 1775 Captain Samuel Nicholas formed two battalions of Continental Marines into the first naval infantry.