The scene now shifts to the lower Mississippi, and the heavy villain of the melodrama appears on the stage in the uniform of a United States military officer--General James Wilkinson. He had been under orders since May 6, 1806, to repair to the Territory of Orleans with as little delay as possible and to repel any invasion east of the River Sabine; but it was now September and he had only just reached Natchitoches, where the American volunteers and militiamen from Louisiana and Mississippi were concentrating. Much water had flowed under the bridge since Aaron Burr visited New Orleans.
After President Jefferson's bellicose message of the previous December, war with Spain seemed inevitable. And when Spanish troops crossed the Sabine in July and took up their post only seventeen miles from Natchitoches, Western Americans awaited only the word to begin hostilities. The Orleans Gazette declared that the time to repel Spanish aggression had come. The enemy must be driven beyond the Sabine. "The route from Natchitoches to Mexico is clear, plain, and open." The occasion was at hand "for conferring on our oppressed Spanish brethren in Mexico those inestimable blessings of freedom which we ourselves enjoy." "Gallant Louisianians! Now is the time to distinguish yourselves .... Should the generous efforts of our Government to establish a free, independent Republican Empire in Mexico be successful, how fortunate, how enviable would be the situation in New Orleans!" The editor who sounded this clarion call was a coadjutor of Burr. On the flood tide of a popular war against Spain, they proposed to float their own expedition. Much depended on General Wilkinson; but he had already written privately of subverting the Spanish Government in Mexico, and carrying "our conquests to California and the Isthmus of Darien."
With much swagger and braggadocio, Wilkinson advanced to the center of the stage. He would drive the Spaniards over the Sabine, though they outnumbered him three to one. "I believe, my friend," he wrote, "I shall be obliged to fight and to flog them." Magnificent stage thunder. But to Wilkinson's chagrin the Spaniards withdrew of their own accord. Not a Spaniard remained to contest his advance to the border. Yet, oddly enough, he remained idle in camp. Why?