Back in the red days on the Rio Grande, word came from Pancho Villa that any "Gringos" found in Mexico would be killed on sight. The American people were interested in the Revolution at the border. Gibbons went into the Mexican hills alone and called Villa's bluff. He did more. He fitted out a box car, attached it to the revolutionary bandits' train and was in the thick of three of Villa's biggest battles. Gibbons brought out of Mexico the first authoritative information on the Mexican situation. The following year the War Department accredited him to General Pershing's punitive expedition and he rode with the flying column led by General Pershing when it crossed the border. In 1917, the then Imperial German Government announced to the world that on and after February 1st its submarines would sink without warning any ship that ventured to enter a zone it had drawn in the waters of the North Atlantic. Gibbons sensed the meaning of this impudent challenge. He saw ahead the overt act that was bound to come and be the cause of the United States entering the war. In these days the cry of "Preparedness" was echoing the land. England had paid dearly for her lack of preparedness. The inefficient volunteer system had cost her priceless blood. The _Chicago Tribune_ sought the most available newspaper man to send to London and write the story of England's costly mistakes for the profit of the American people. Gibbons was picked for the mission and arrangement was made for him to travel on the steamer by which the discredited Von Bernstorff was to return to Germany. The ship's safe conduct was guaranteed. Gibbons did not like this feature of the trip. He wanted to ride the seas in a ship without guarantees. His mind was on the overt act. He wanted to be on the job when it happened. He cancelled the passage provided for him on the Von Bernstorff ship and took passage on the largest liner in port, a ship large enough to be readily seen through a submarine periscope and important enough to attract the special attention of the German Admiralty. He sailed on the _Laconia_, an eighteen thousand ton Cunarder. On the night of February 27, 1917, when the _Laconia_ was two hundred miles off the coast of Ireland, the Gibbons' "hunch" was fulfilled. The _Laconia_ was torpedoed and suck. After a perilous night in a small boat on the open sea, Gibbons was rescued and brought into Queenstown. He opened the cables and flashed to America the most powerful call to arms to the American people. It shook the country. It was the testimony of an eye witness and it convinced the Imperial German Government, beyond all reasonable doubt, of the wilful and malicious murder of American citizens. The Gibbons story furnished the proof of the overt act and it was unofficially admitted at Washington that it was the determining factor in sending America into the war one month later.