A Solution to Protecting Our Southern Border

If you consider the thirty eight parallel in Korea has been successfully guarded since the 50's, there must be a good reason for this success. Is it because of the United States? I wonder, since the border between the U.S. and Mexico is as porous as a rusted colander. The answer must be South Korean soldiers, who are notorious for being disciplined, fierce fighters. So, lets put a few thousand on the border and tell them to keep it secure. I think it will work.