Only obelisks divided the U.S. and Mexico sides of Nogales. Then the 1918 Battle of Ambos forever changed the Southwestern border's sister cities.

Only obelisks divided the U.S. and Mexico sides of Nogales. Then the 1918 Battle of Ambos forever changed the Southwestern border's sister cities.

In August 1918, the U.S. and Mexico went to war during the “Battle of Ambos Nogales,” which led to the creation of permanent border fences meant to control the movement of people.

Arizona is home to a pair of vibrant twin border cities known as Ambos, Nogales. The cities are split by the U.S.-Mexico border but share a storied history. Here's what you need to know about the ...