Chart posted at vdare.com

Fifty-three years ago (article was published in 2006), when newly elected Dwight Eisenhower moved into the White House, America's southern frontier was as porous as a spaghetti sieve. As many as 3 million illegal migrants had walked and waded northward over a period of several years for jobs in California, Arizona, Texas, and points beyond.

President Eisenhower cut off this illegal traffic. He did it quickly and decisively with only 1,075 United States Border Patrol agents – less than one-tenth of today's force. The operation is still highly praised among veterans of the Border Patrol.
Full article in the Christian Science Monitor