
The Rio Grande defines the northern edge of this tactical study, carving a deep meander that separates the United States and Mexico along the border of Texas and Tamaulipas. This map, based on work by the Corps of Engineers and U.S. Army during the mid-1920s, documents a critical corridor of the Rio Grande Valley before significant mid-century development. Small settlements like Los Ebanos and Havana are situated near the riverbanks, alongside family-named landmarks such as Antonio de la Banco. The presence of a Pump along the river highlights the early agricultural reliance on irrigation in Starr and Hidalgo counties. While the map contains significant open surveying space, the river margin is densely detailed, capturing the specific geography of international boundaries and early power transmission lines.
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This is the sole edition of this map. No revisions or reprints were ever made.
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