The postcard caption reads: 'U.S. Soldiers resting under shade trees at Colonia Díaz'. This group of U.S. Soldiers is part of the American Punitive Expedition or Mexican Expedition who were sent into Mexico to confront and/or capture Mexican Revolutionary Francisco "Pancho" Villa. The Punitive Expedition into Mexico was led by Brigadier General John J. Pershing. The Punitive Expedition into Mexico went on from March 14, 1916 to around February 7, 1917. Colonia Díaz itself was the first permanent Mormon colony in Mexico, located along the Casas Grandes River, in the state of Chihuahua, Mexico. Back of the postcard: 4/24/16 'My Dear G M - Everything fine here. Glad you are well. Try and enjoy yourself. Will write soon. Doing business! Walter'. Addressed to: G.M. Horne, Box 365, Portland, Maine. This postcard has a 1912 1c Washington, green, single line watermark stamp.