Harsh jungle environment
difficultly identifying the enemy
demoralization
there was a chemical used called agent orange, but it was used by the U.S. so i dont think it would be categorized as something that american soldiers faced.
C. bc Popular Sovereignty means a choice made by the people.
the compromise failed to pass because of the opposition by both pro-slavery southern Democrats, which was led by John C. Calhoun, and anti-slavery northern Whigs.