Pentagon contractors made a simple navigational error when placing border security signs, highlighting the challenging geography where the Rio Grande meets the Gulf. The shifting river course and changing topography naturally alter boundary perceptions, making precise border demarcation difficult even for experienced personnel.
American military contractors created an international incident by accidentally invading Mexico and declaring sovereign Mexican territory as U.S. property. This embarrassing blunder forced heavily armed Mexican forces to respond and remove illegal signs, violating international treaties and escalating tensions unnecessarily.
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