The Punitive Expedition ordered.

The following orders went out to the U.S. Army:

You will promptly organize an adequate military force of troops under the command of Brigadier General John J. Pershing and will direct him to proceed promptly across the border in pursuit of the Mexican band which attacked the town of Columbus and the troops there on the morning of the 9th instant. These troops will be withdrawn to American territory as soon as the de facto government in Mexico is able to relieve them of this work period. In any event, the work of these troops will be regarded as finished as soon as Villa’s band or bands are known to be broken up. In carrying out these instructions you are authorized to employ whatever guides and interpreters are necessary and you are given general authority to employ such transportation including motor transportation, with necessary civilian personnel as may be required. 

You are instructed to make all practical use of the aeroplanes at San Antonio for observation. Telegraph for whatever reinforcements or material you need. Notify this office as to force selected and expedite movement