His base was the little village of Pocahontas, situated, nearly upon the Missouri and Arkansas border, and at the head of navigation upon the Big Black river. Here General Hardee had collected all the Arkansas troops which were available for service upon that line, amounting to perhaps six or seven thousand men. Various causes contributed to reduce his effective total to about one half of that number. All of the troops were indifferently armed, some were entirely unarmed. The sickness always incidental to a first experience of camp life, in the infantry, had prostrated hundreds. Change of diet and of habits, and the monotony of the camp are sufficient of themselves, and rarely fail to induce diseases among raw troops, but a scourge broke out among the troops collected at Pocahontas which confounded all, at least of the non-medical observers. This was nothing more than measles, but in an intensely aggravated and very dangerous form. It was hard to believe that there was such a proportion of adult men who had escaped a malady generally thought one of the affections of childhood. It was so virulent, at the time and place of which I write, and in so many instances fatal, that many confidently believed it to be a different disease from the ordinary measles, although the Surgeons pronounced it the same. It was called "black measles," and was certainly a most malignant type of the disease. I have been since informed that it raged with equal fury and with the same characteristics among the volunteers just called into the field in many other localities. Its victims at Pocahontas were counted by the scores.
As the Big Black river is navigable for small craft at all seasons, General Hardee had no difficulty in supplying the troops stationed at Pocahontas, but after leaving that point he was compelled to depend for supplies upon wheel transportation, with which he was very indifferently provided, and upon the country, which was sterile and sparsely settled.
The only line of advance from Pocahontas which gave promise of important results, or which, indeed, was practicable, was by Greenville, distant some fifty-five or sixty miles from Pocahontas, and Frederickton, to Ironton, and thence along the Iron Mountain Railroad by the most practicable roads to St. Louis. The country between Pocahontas and Ironton is rugged and heavily wooded. It is penetrated by few roads, and, in 1861, by no means abounded in supplies. General Hardee advanced as far as Greenville, and threatened Ironton.