At the conclusion of active operations in the Trans-Mississippi district, in the autumn of 1861, the State forces of Missouri, still retaining their separate organization, under General Price, and the Confederate forces of McCulloch, were located south of Springfield, near the Arkansas line. An unfortunate phase of the Southern conduct of the war in this quarter, and one from which arose no little apprehension, was the apparently irreconcilable difference between Generals Price and McCulloch. With a view to secure the indispensable element of harmony, President Davis, during the winter, appointed Major-General Earl Van Dorn, an able and gallant officer, to the supreme command of military operations in the Trans-Mississippi department. General Van Dorn was a favorite with the President, and his services had already been of a character to justify the high expectations, indulged not less by himself than by the public, of fortunate results of the unanimity, at last secured in a quarter where its absence had been severely felt. The result of the enemy's movements, begun early in January, 1862, was the retreat of the weak column of Price to the Boston Mountains, in Arkansas, where McCulloch was encamped. This junction of the two commands did not result in coöperation until the arrival of General Van Dorn, early in March. With a vigor characteristic of this officer's career, Van Dorn advanced against the enemy, advantageously posted, and with numbers superior to his own force. The result was the battle of Elk Horn, a brilliant but fruitless engagement, in which the Southern commander, in consequence of the want of discipline among his soldiers, and partially through the effects of those earlier dissensions with which he had no connection, failed to realize the ends at which he aimed.[49] Elk Horn was probably the most considerable engagement, in point of the numbers engaged, fought during the war, west of the Mississippi. Unimportant in its bearing upon the general character of the war, it was a decided check upon the aspiration of the Confederate Government to recover Missouri, and to give its authority a solid establishment in the Trans-Mississippi region. This was afterward the least important theatre of the war, though subsequent events there were by no means unworthy of record. Even at this early stage, the war was rapidly tending to a concentration of the energies of both parties, upon the more vital points of conflict in Virginia, and the central zone of the Confederacy. A few weeks later Generals Van Dorn and Price, with the major portion of the Trans-Mississippi army, were transferred to the scene of operations east of the great river.