Despite Carranza’s victories on the battlefield in the summer of 1915, the situation in Mexico seemed to deteriorate by the day. Reports from Mexico City filled newspaper columns with tales of starvation, looting, and chaos. The Mexican-American border was on fire, as well. The deteriorating situation at the border stemmed from what became known as the Plan de San Diego. Issued in the town of San Diego, Texas in January 1915, the plan called for an uprising of the Mexican-American populations in Texas, New Mexico, Arizona, Colorado, and California against the “Yankee tyranny.” Among other stipulations, the manifesto included passages that alarmed American officials who first saw a copy of the plan in the end of January 1915.
Objective number 5 read: "It is strictly forbidden to hold prisoners …they shall be shot immediately without any pretext."
Number 6: “Every foreigner [i.e. any non-Chicano in the states to be liberated from the Yankee tyranny] who shall be found armed and cannot prove his right to carry arms, shall be summarily executed…”
Number 7: “Every North American [sic] over sixteen years of age shall be put to death…”
While local sheriffs carefully watched the mood among the Mexican-American population, not much happened as a result of the plan until June 1915. “Bands of outlaws” raided ranches throughout the lower Rio Grande Valley within weeks of President Wilson putting pressure on the Mexican revolutionary factions in his ultimatum of June 2, 1915. Propaganda, spread through agents of the Carranza administration, proclaimed a “Texas Revolution,” an uprising that called for Mexican-Americans freeing themselves from the “shackles of Anglo supremacy.” The first American, an eighteen-year-old farmhand, died from the bullets of a Chicano raider in the end of July. During July and August hundreds of attacks occurred, some of which had nothing to do with the revolución de Texas but undoubtedly, people took advantage of the situation to settle old scores. Short of personnel and hesitant to get involved, the U.S. army reluctantly reinforced the overwhelmed Texas Rangers and local law enforcement authorities in September. Raiders not only robbed banks, shops, and ranches but also blew up railroad bridges and cut telegraph lines. The Mexican Revolution finally seemed to be spilling over into U.S. territory in a deadly and disturbing way.
Some American newspapers quickly blamed the disturbances on German agitation. These suspicions seem to have pressured Secretary Lansing and possibly also President Woodrow Wilson to find a solution for stabilizing Mexico as quickly as possible. Lansing wrote in his diary, “Germany does not want one faction dominant in Mexico; therefore we must recognize one faction as dominant in Mexico… It comes down to this: our possible relations with Germany must be our first consideration; and all our intercourse with Mexico must be regulated accordingly.” While German archives do not reveal any obvious financing or organizing of the border troubles, there are indications that the Secret War Council, and Heinrich Albert in particular, could have been involved. Maurice Leon, a member of the French embassy in Washington who handled financial and legal affairs for the Allies, suggested to the U.S. State Department two days after Villa’s attack on Columbus, New Mexico in the spring of 1916, “heavy sales of German marks on Wall Street ‘seem to point to the possibility that Villa and his band not only received a part of their proceeds, but also that the great part is to be utilized to induce Mexican ‘leaders’ to oppose by force [U.S.] operations to suppress border outlawry.”
This allegation is partly correct. The head of the Secret War Council™, Heinrich Albert, and the German government, indeed, engaged in heavy trading to prop up the devalued German Mark. However, although not impossible, there is no indication in Albert’s financial records that any of these funds went to Mexico. Historians Harris and Sadler’s research, as well, shows that on the surface the unrest was conceived, organized, and financed through the Carranza administration in Mexico. However, there are links to German agents that have been overlooked. German agents had infiltrated the Carranza administration. While Sommerfeld organized munitions supplies for Villa at the same time that he supported the efforts of the U.S. State Department to wrest important concessions from the revolutionary chieftain, German agent Arnoldo Krumm-Heller toured South Texas on behalf of Carranza (and the German Kaiser) to incite the Mexican-American population into revolt.
The Pan-American Conference reconvened on September 18, 1915. The decision to recognize Carranza framed the assembly. As a member of the administration, General Scott knew firsthand that President Wilson had adjusted his views despite the “pig-headedness” of the victorious Mexican leader, Carranza. A week before the conference and the day after Villa’s forces lost control over the important railroad hub of Torreón and retreated north, General Scott, alarmed by Villa’s deteriorating negotiation power, rallied the pro-Villa faction. “I told Bonilla and Llorente to get busy now to combat this Carranza propaganda here [that Villa was beaten] and regain the standing for Villa that has been lost… I told [Felix] Sommerfeld the same thing and urged him to do it. …I do not know what we can do further as I have done everything I can think of.”
Scott’s dread was well justified. Two days before the Pan-American delegates reconvened on September 15, the State Department ordered all U.S. consuls out of Mexico. Americans residing in Sonora and Chihuahua received word to get out, as well. British and French officials also scurried to safety on the American side of the border. No one really knew what to expect from Villa once he realized that he had been outfoxed. Although Secretary Lansing had notified the press that Carranza would be recognized, some members of the Pan-American Conference, possibly through the last-minute efforts of Díaz Lombardo, Gonzalez Garza, Bonilla, Llorente, and Sommerfeld, refused to give their agreement. Rather, the group’s announcement on September 18 proclaimed that whichever faction was deemed militarily stronger by the middle of October would be recognized as the de facto government.
Meanwhile, the unrest on the border took on crisis proportions. Carrancista irregulars engaged soldiers of the 12th Cavalry in Brownsville, Texas, on August 3rd, leaving one soldier dead and two wounded. Mexican raiders engaged the 3rd Cavalry and Texas Rangers again in Brownsville on September 6 in a shootout that left two Mexicans dead. U.S. authorities involved in battling the uprising and arresting the organizers behind the revolución de Texas left no stone unturned. Dozens of Mexican-Americans faced arrest and detention. Reprisals by the local Anglo population and the Texas Rangers raised the specter of a race war. As the battle for diplomatic recognition intensified in Washington and New York, so did the war in Texas. By the time the raids ended in October, six Anglos and approximately three hundred Mexicans and Mexican-Americans had died.
The raids ended as suddenly as they had started. They stopped on October 1, 1915, shortly after the American government announced that it would recognize Carranza’s faction as the legitimate government of Mexico. General Funston reported to his superiors in Washington on
October 13 that “it had been ten days since the last hostile shot had been fired.” Historians Harris and Sadler concluded in their analysis of the uprising, “once Carranza withdrew his support, the insurrection in Texas collapsed like a punctured balloon… Viewing Mexican- Americans as a useful fifth column, Carranza skillfully played on their hopes and fears as a means of exerting pressure on the United States. When his [Carranza’s] policies shifted [and those of the United States], they were cynically abandoned… The Plan left a legacy of racial tension in south Texas that has endured to the present.” Carranza once more resurrected the Plan de San Diego in the summer of 1916, when, indeed, the United States and Mexico marched to the brink of war. And again, this time only partially achieving his objectives, Carranza shut down the unrest.
Read more on the Mexican Front in the Great War.