troops in Mexico was an act of bad faith and was being used by our Government for political purposes; that their presence upon the soil of Mexico constituted a grave wrong to that country and ending with the following threat:
"The Mexican government understands that in the face of the unwillingness of the American Government to withdraw the above forces, it would be left no other recourse than to procure the defence of its territory by means of arms."
In reply to this letter Secretary Lansing, in his indignant letter of June 20, 1916, quoted in Chapter IV, said:
At the same time General Treviño, in command of a force of Mexican troops located near the camp of the American punitive expedition, sent a note to General Pershing, under date of June 16, 1916, as follows: