Here the contrast ends and the comparison begins. The Eastern and Western men had many peculiarities in common, and the cause of the existing differences, education, produced the similarities. The fighting qualities of each were the same. Both armies went into battle with the same resolute air of men of business, and, under the same leaders, each displayed equal endurance. Grant was instrumental in showing the equality existing in this respect, and at the same time he smothered a painful feeling which at one time existed in the West, based on the ill success of the Potomac Army under former leaders, and finding expression in the idea that the Eastern troops did not fight as well as the Western men. This feeling at one time threatened to become a serious sectional difficulty, when General Grant took immediate control over the Potomac Army, and infused his spirit of persistence into it. The discipline of the Potomac Army men amid the continually recurring disasters of the first three years of the war, their firmness under defeat or questionable success, was always admirable, and it only required the tutorship of Grant to prove their endurance, and make them the admiration of the whole country. That army always confronted the best of the rebel armies at the key-point of the field. It fought more battles than any other two armies in the field. Grant added the only lesson it needed to make its education perfect, and taught it, as he had taught the Army of the Tennessee, how to display its endurance by showing it how to fight its battles through. The same cause, education, which produces this marked distinction, may also be observed as tracing a difference between either of these classes in our army and a third class--a mere fraction, however--representing the Southern element. In the Union army there have been from the first a number of Southern Unionists, generally mountaineers and refugees from the East Tennessee regions, who, according to all statistics and observation, were uneducated and ignorant, and whose lax discipline has more than once caused slurs to be cast upon the army. In camp they were unclean, on the march they were great stragglers, and in battle untrustworthy and ineffective. Only the very strict discipline of one or two regular officers assigned to their command redeemed the character of a few of these regiments from this general reputation. The men of this class were not superior to the rebel soldiers in any respect.