What are our borders?
Before California was part of the United States we know that it belonged to Mexico. Not was just the state of California part of Mexico but also the states of Utah, Nevada, Arizona, New Mexico, and parts of Wyoming and Colorado.
Now that we have the two different countries of Mexico and United States side by side on the map there are borders. The borders around the United States are on the states of California, Arizona, Texas and New Mexico. There are also the states of Mexico where the borders those states being Sonora, Chihuahua, Coahuila, Baja California, Tamaulipas and Nuevo Leon.