In the Mexican-American War, Mexico faced an enemy that was coming into its own as a military power.

Approximately 700 miles of barbed wire, chain link, post-and-rail and wire mesh fencing has been erected along the border.

Most may not think of Mexico as contributing to the Allied effort, but it contributed key resources, as well as fighting power.

Unlike the northern free states, Mexico didn’t agree to return people who had fled slavery.