Lincoln’s stated goal in waging war against the South was to maintain the territorial union of States within the 1787 Constitution, which Southern States had withdrawn from. The South established its own union, sending commissioners to Washington to arrange a settlement of funds due that government and a treaty of peace between the two countries. Lincoln’s refused to see the commissioners and secretly sent an armed expedition to reinforce Fort Sumter, by then a useless fortification as it was within South Carolina’s sovereign territory – and explicitly constructed with funds from all States for South Carolina’s protection.
Even if Lincoln reasoned that South Carolina could not withdraw from the 1787 union and it remained within, waging war against a State was treason as defined in Article III, Section 3 of the United States Constitution.
Locked in a Bloodbath
“Soon after hostilities began, the Model 1861 Springfield rifle, capable of killing fire at a thousand yards, would become standard issue for Union infantry, while Confederate troops were being equipped with small arms equally as good. The result was mass slaughter.
In eight of the first twelve big battles, Confederates assumed the tactical offensive, and lost ninety-seven thousand men in doing so. Altogether, the South suffered 175,000 battle casualties in the first twenty-seven months of fighting, a figure somewhat higher than the entire Confederate military establishment in 1861.
[Grant accumulated] sixty-four thousand casualties during the three months of his sledgehammer Wilderness campaign and taking as the major sign of his victory, in late May 1864, the fact that a battle with Lee’s troops “outside of entrenchments cannot be had.”
Yet the Confederates would remain unbeaten inside their trenches for almost a year more. And, in fact, a better indication of the true tactical situation was the spectacle of Union troops pinning their names to their uniforms shortly before the notorious frontal assault on Confederate positions at Cold Harbor on 3 June so that their corpses might be better identified after the battle.
Unlike their officers, foot soldiers drew an altogether more practical, if less heroic, conclusion as to the tactical significance of new weaponry, and sought cover and defensible positions whenever possible. Thus, by mid-1863 both sides were becoming addicted to trenches . . .
As far as they went, field fortifications were an entirely correct solution to the revolution in small arms, the long-range rifle having roughly tripled the advantage of defense over offense by putting attacking troops under deadly fire almost from the moment they became visible. Yet trenches also prefaced a very static and inconclusive sort of war, as the siege of Richmond-Petersburg indicated. Thus at some point it became necessary for troops to physically overcome opposing trenches.
Cavalry, on the other hand, was deeply and permanently undermined. The fate of the saber charge was epitomized by the deaths of one Major Keenan and his adjutant, who jointly led a column of the Eighth Pennsylvania Horse in a desperate advance against Stonewall Jackson’s victorious infantry at Chancellorsville. Not only did the charge fail miserably, but after the battle the bodies of Keenan and his adjutant were found to have thirteen and nine bullet wounds, respectively.”
(Of Arms and Men: A History of War, Weapons and Aggression, Robert L. O’Connell, Oxford University Press, 1989, excerpts pp. 197-199)