Waxa uu is casishay sanadkii 1919 si uu u aqbalo booska wasaaradda arrimaha dibadda ee Maraykanka isagoo ah la taliyaha dhaqaalaha ee Haiti, intii jamhuriyadda jasiiradda ay haysatay
Ciidamada badda ee Maraykanka. Intii uu ku sugnaa Haiti, wuxuu isku dhacay madaxweynaha Haiti Philippe Sudré Dartiguenave oo ku saabsan arrimaha dhaqaalaha, taas oo keentay in McIlhenny uu joojiyo mushaharka Dartiguenave, taasoo keentay dhibaato diblomaasiyadeed oo ku martiqaaday dhaleeceyn gaar ah oo ka timid Waaxda Arrimaha Dibadda ee Mareykanka.