tˈɪliz fˈɜːst ɐsˈaɪnmənt wʌz tə ðə ɹᵻpˈʌblɪk ʌv vˌiːətnˈɑːm wɪð ɐ tɹˈuːp, fˈɜːst skwˈɑːdɹən, fˈoːɹθ kˈævəlɹi ɹˈɛdʒɪmənt æz ɐ vˈiəkəl kɹˈuːmən.
Tilley's first assignment was to the Republic of Vietnam with A Troop, 1st Squadron, 4th Cavalry Regiment as a vehicle crewman.