If I remember this right, it was the French.
The Oregon trail was a trail that was used by the Americans to travel from Illionois(?) to the west, ending up in Oregon, as named "Oregon trail"
Well According to the author, why did a Mexican force attack Zachary Taylor's troops when they arrived at the Rio Grande River? ... Polk was not fighting to protect Americans on American soil, he was provoking the Mexican government into firing the first shot.
Answer: did you ever find the answer?
Explanation: