Thanks for the history lesson. I Googled the expedition and learned the following:
“General Pershing’s Mexican Expedition to capture Pancho Villa predates his World War I career
“The small American town of Columbus, New Mexico, was the site of a major event 100 years ago today. On March 9, 1916, spurred by events in the Mexican Revolution, General Francisco “Pancho” Villa’s forces attacked the camp of the 13th Cavalry Regiment. In reaction to this attack, President Woodrow Wilson appointed General John Pershing as commander of a U.S. Army expeditionary force that was to capture Villa and police the U.S.-Mexico border. Called the Punitive Expedition at the time, this was just the beginning of a lengthy search for Villa that never resulted in his capture, now known as the Mexican Expedition. It took place March 14, 1916, to February 7, 1917.
Why did Villa attack? It’s complicated, but here’s a quick summary. The Mexican Revolution was an uprising that impacted the social, economic, and political life of both Mexico and the United States. The United States had become heavily invested in Mexican mining, railroads, and oil operations and protected these investments through military and political interventions in Mexico. In support of their people, Mexican revolutionary leaders sought land reforms and the nationalization of these operations.
At one time, President Wilson supported Villa and then later withdrew support. Angered by the reversal, Villa attacked.”
https://americanhistory.si.edu/blog/pershings-mexican-expedition
There was a 13th cavalry? I thought it was the Blackhorse that rode south. .