Camp Callan was built in November of 1940 as a Coast Artillery Corps replacement training center for new inductees. Open for business in January of 1941, it was named for Maj. Gen. Robert Callan (1874-1936), a veteran of the Spanish American War and World War I.

United States Naval Training Center, Bainbridge, Maryland was the US Navy Training Center located at Port Deposit, Maryland.

Camp Grant was opened just south of Rockford in 1917 to train soldiers for World War I. It was closed in 1921 and turned over to the Illinois National Guard for use as a training center in 1924.

1859
For the United States Marine Corps, 1859 marks the year of the modern chevron as we know it today.  The Uniform Regulations of that year established the silk lace pointed chevrons.  The regulation stated that chevrons:

 Farragut Naval Station rose almost overnight on wide-open fields and rolling hills that had once served as a seasonal stop for early Indian and pioneer migrations. In late 1941, the U.S. government snapped up the land from private owners, Kootenai County, and a railway company to establish an inland naval base more than 300 miles away from the western coastline, where the nation feared a Japanese invasion.   It was named after David Farragut - who was instrumental in setting up Mare Island Naval Shipyard.

Amarillo Air Force Base, originally Amarillo Army Air Field is located in Potter County, Texas, approximately 6 miles East of downtown Amarillo within the easternmost city limits. The City of Amarillo is located on the boundary of Potter and Randall Counties in the High Plains of the Texas Panhandle.

Fort Ord was established in 1917, originally as Camp Gigling, as a military training base for infantry troops. In 1917, the US Army bought the present day East Garrison and nearby lands on the east side of Fort Ord to use as a maneuver and training ground for field artillery and cavalry troops stationed at the Presidio of Monterey. & Before the Army's use of the property, the area was agricultural, as is much of the surrounding land today. No permanent improvements were made until the late 1930s, when administrative buildings, barracks, mess halls, tent pads, and a sewage treatment plant were constructed. This facility was designated as Camp Ord in 1939 and became Fort Ord in 1940. In 1938, additional agricultural property was purchased for the development of the Main Garrison.

The Great Lakes Naval Training Center is home to the U.S. Navy's only Recruit Training Command. The largest military installation in Illinois and the largest training center in the Navy, the base includes 1,153 buildings on 1,628 acres and uses 50 miles of roadway to provide access to the Center's facilities.