The Civil War: Strategy, Resources & Turning Points · Grade 7 Social Studies

Part 1 · The ledger, and why it did not settle anything

Read the figure first and the advantage looks overwhelming. The Union had four times the free population, nine times the factory output, more than twice the railroad mileage and almost all the gunmaking capacity, plus a navy, a treasury and diplomatic recognition.

The asymmetry in war aims is what cancels much of that. To win, the Union had to march into a region of 750,000 square miles, defeat its armies, occupy its cities and hold them against a hostile population. To win, the Confederacy had to not lose, and wait for the 1864 northern election.

Defending is also cheaper than attacking. A defender knows the ground, has shorter supply lines, and in this war had rifled muskets accurate at several hundred yards against attacking formations that had been taught tactics designed for smoothbore guns accurate at eighty. Assaults that would have worked in 1815 slaughtered the men making them.

The one resource the ledger leaves out ended up mattering most. The 3.5 million enslaved people in the Confederacy were its labour force, and they were also the Union's largest potential recruiting pool. When the war aim changed in 1863, roughly 180,000 Black soldiers and sailors joined the Union forces, a number larger than most of the armies in the field.

Part 2 · Strategy and the border states

General Winfield Scott proposed what the newspapers mocked as the Anaconda Plan: blockade the coast, take the Mississippi, and squeeze rather than charge. It was dismissed in 1861 as too slow and is essentially what won the war, which is a useful lesson about public impatience.

The blockade had to cover 3,500 miles of coastline and was porous for years, but it worked by degrees. The Confederacy exported cotton and imported almost everything manufactured, so cutting the trade starved it of rifles, railway iron, medicine and eventually shoes.

Four slave states stayed in the Union: Delaware, Maryland, Kentucky and Missouri. Together they held substantial population, the gun works at Harpers Ferry, the Ohio River and the capital's land approaches. Lincoln is supposed to have said he hoped to have God on his side but he must have Kentucky, and he governed accordingly, suspending habeas corpus in Maryland and arresting legislators to keep it from voting on secession.

That calculation explains the first eighteen months of Union policy. Lincoln said the war was for the Union and not against slavery, overruled generals who freed enslaved people in their districts, and offered compensated emancipation to the border states, who refused. The first battle at Bull Run in July 1861 ended with a Union rout and civilians who had driven out from Washington with picnics fleeing back along the same road. Nobody said ninety days again.

Part 3 · Antietam

In September 1862 Lee marched into Maryland, hoping a victory on northern soil would bring British and French recognition and break northern nerve before the autumn elections. Then two Union soldiers found a copy of his orders, Special Order 191, wrapped around three cigars in an abandoned camp, and General McClellan knew exactly how Lee's army was divided.

Antietam was fought on 17 September 1862 along a creek near Sharpsburg. In a single day roughly 22,700 men were killed, wounded or went missing, more than on any other day in American history, and the photographs Alexander Gardner took of the dead still lying in the sunken road were exhibited in New York weeks later. It was the first time most Americans had seen what a battlefield actually looked like.

Tactically it settled nothing. Lee held his ground, McClellan declined to use his reserves, and the Confederate army withdrew across the Potomac intact; Lincoln removed McClellan for not pursuing.

Strategically it decided two things. Lee's invasion had failed, so Britain and France shelved recognition and never returned to it. And Lincoln had been holding a draft of the Emancipation Proclamation since July, waiting for a victory so that it would not read as a desperate measure. Five days after the battle, on 22 September, he issued it, declaring that enslaved people in areas still in rebellion on 1 January 1863 would be free. From that point no European power could intervene on the Confederate side without appearing to fight for slavery.

Part 4 · 1863 to Appomattox

July 1863 brought two results within a day of each other. At Gettysburg, Lee's second invasion ended in three days of fighting and about 51,000 casualties, closing with a frontal assault across open ground that lost more than half the men who made it. On 4 July, Vicksburg surrendered to Grant after a six-week siege, giving the Union the whole Mississippi and cutting the Confederacy in two.

Grant was brought east in 1864 and fought differently. Where previous commanders withdrew to reorganise after a bloody engagement, he kept moving south after each one, accepting losses the Union could replace and the Confederacy could not. Northern newspapers called him a butcher; the casualty exchange was in fact roughly even, and that was the point.

The 1864 election was the Confederacy's last real hope, and for much of that summer Lincoln expected to lose. Sherman's capture of Atlanta in September changed the mood, Lincoln won comfortably, and Sherman then marched to the sea, destroying railways, mills and crops across Georgia on the principle that an army's supply base is a military target.

Lee surrendered the Army of Northern Virginia at Appomattox Court House on 9 April 1865, and the remaining forces followed over the next two months. Lincoln was shot five days after Appomattox and died on 15 April, which removed the one man with both the authority and the inclination to shape what came next. The last lesson of this chapter is about what came next, and about how much the shape of it depended on his absence.

A note on the figures you will meet in other books. The traditional death toll of 620,000 came from an 1889 count of army records; a demographer working from census data in 2011 put it closer to 750,000, and most historians now give a range. Both numbers are defensible, both rest on incomplete records, and a source that reports either one as exact is telling you something about the author rather than about the war.