Obviously, it is military mail during World War II. However, here are a couple of interesting tidbits of information:
Quote:
Camp Swift is bordered by U.S. highways 95 and 290 twenty-eight miles east of Austin and seven miles north of Bastrop in Bastrop County. It was built in 1942 on 55,906 acres and initially had 2,750 buildings designed to accommodate 44,000 troops. The camp was named after Eben Swift,qv a World War Iqv commander and author. During World War IIqv it reached a maximum strength of 90,000 troops and included, at different times, the 95th, 97th, and 102d Infantry divisions, the 10th Mountain Division, the 116th and 120th Tank Destroyer battalions, and the 5th Headquarters, Special Troops, of the Third Army. Swift was the largest army training and transshipment camp in Texas. It also housed 3,865 German prisoners of war.qv After the war much of the site was returned to former owners. The government retained 11,700 acres as a military reservation. That land housed parts of the Texas National Guard,qv a medium-security federal prison, and a University of Texas cancer research center. Environmental-impact studies and development plans for the mining of extensive lignite deposits under Camp Swift began in the 1970s. Opposition by environmentalists and former landowners resulted in decades of litigation.
According to the USPOD Postal Bulletins, the post office branch for Camp Swift was established June 1, 1942 and was discontinued May 3, 1947, so it was only in existence a relatively short five (5) years.
Here are a couple of postcards currently for sale on
ebay that show what the Camp looked like during its heydey as a military training facility:



