Cika wannan jumla:
A ranar 18 ga Yuni, 1916, Shugaba Woodrow Wilson ya kaddamar da dakarun tsaron kasa don mayar da martani ga harin da Pancho Villa ya kai a New Mexico, kuma ya tura rundunar B zuwa kan iyakar Mexico a Nogales da Arivaca, Arizona, inda suka kasance har tsawon watanni suna tsaron iyakar. Kyaftin John Henry Kelso Davis, wanda ya kammala karatun Kwalejin Trinity, shi ne kwamandan wannan aikin.