The Union certainly had considerable advantages. There were 22 million people in the North compared with only 9 million in the South (of whom only 5.5 million were whites). The North had a much greater industrial capacity. In 1860 Northern states produced 97 per cent of the USA’s firearms and 94 per cent of its pig iron. Even in agriculture the North enjoyed an edge. The Confederacy hoped to make good its lack of materials by trading with Europe, but the Union used its naval strength to impose an increasingly tight blockade. The Union was further aided by the fact that four slave states – Delaware, Missouri, Maryland and Kentucky – remained loyal to the Union. Nor were all the people within the 11 Confederate states committed to the Confederate cause. Pockets of Unionism existed, especially in the Appalachian Mountains. Slaves were also a potential fifth column. Throughout the war there was a steady flow of blacks fleeing to Union armies. The North converted first their labour and eventually their military manpower into a Union asset.
Nevertheless, in 1861 most Southerners thought that the Confederacy was favourite to win the war. The Confederacy’s sheer size – 750,000 square miles – was a major asset, making if difficult to blockade, occupy and conquer. Confederate forces did not have to invade the North: they simply needed to defend. The fire-power of the rifle-musket meant that battlefield tactics now favoured the defender. The Union, having no option but to attack, was bound to suffer heavy casualties. Southerners hoped that Northern opinion might come to question high losses. If Northern will collapsed, the Confederacy would win by default. Geography gave the Confederacy an important strategic advantage. In the crucial theatre of the war – North Virginia – a series of rivers provided a barrier to Union armies intent on capturing Richmond, the Confederate capital. Slavery, which might seem to be a Confederate weakness,