Brownsville, TEXAS - Fort Brown - Pontoon Bridge - Machine Gun Company - 1915:  Brownsville is a city in Cameron County in the U.S. state of Texas. It is on the western Gulf Coast in South Texas, adjacent to the border with Matamoros, Mexico. The city covers 145.2 sq mi (376.066 km2), and has a population of 186,738 as of the 2020 census.  It is the 139th-largest city in the United States and 18th-largest in Texas. It is part of the Matamoros–Brownsville metropolitan area. The city is known for its year-round subtropical climate, deep-water seaport, and Hispanic culture. Fort Brown (originally Fort Texas) was a military post of the United States Army in Cameron County, Texas during the later half of the 19th century and the early part of the 20th century. Established in 1846, it was the first United States Army military outpost of the recently annexed state. Confederate Army troops stationed there saw action during the American Civil War. In the early 20th century, it was garrisoned in relation to military activity over border conflicts with Mexico. This Divided Back Era postcard, mailed in 1914, is in good condition, but shows some edge wear.  American Colortype[e Co. Chicago.  No. 24.