Topic 5.8 Notes – Military Conflict in the Civil War

Why the Union Won the Civil War

The Union won through a combination of strengths, not one magic reason. Northern population, industry, railroads, food, and ships gave it the capacity for a long war. What mattered is that the Union eventually matched those resources with better leadership, a coordinated strategy, key victories, naval pressure, emancipation, and destruction of Southern infrastructure.

A common mistake is thinking early Confederate success proved the South was stronger. It showed something narrower. Southern advantages worked best in a short war, especially on defense and under strong generals like Lee and Jackson. The North had more potential, but it still had to organize that potential into victory.

The Starting Balance of Strengths and Weaknesses

At the start, each side had real advantages.

• Union advantages included about 22 million people against about 9 million in the Confederacy, including about 3.5 million enslaved people. The North also had more factories, banks, food production, merchant shipping, railroads, and the U.S. Navy.
• That meant the Union could equip huge armies, replace losses more easily, and keep fighting longer.
• Confederate advantages included fighting on home ground, needing only to survive rather than conquer the North, high motivation to defend local communities and slavery, and talented officers like Robert E. Lee and Thomas “Stonewall” Jackson.
• Southern leaders also hoped Northern casualties and war weariness would push the North to compromise.

Geography shaped everything, especially the mix of Union, Confederate, and border states at the start of the war.

Union, Confederate, and border states at the start of the Civil War

• Fort Sumter began the war in April 1861.
• The border states were Delaware, Maryland, Kentucky, and Missouri.
• Maryland mattered because it protected Washington, D.C.
• Kentucky and Missouri mattered because they helped control the Mississippi Valley.
• The Union goal was to defeat Confederate armies and restore federal authority.
• The Confederate goal was to outlast the Union and win independence.
• First Bull Run showed this would be a long war, not a quick rebellion.

How Strategy and Leadership Shifted the War to the Union

Once the war dragged on, strategy and leadership mattered more and more.

1. Anaconda Plan under Winfield Scott aimed to blockade Southern ports, seize the Mississippi River, and squeeze the Confederacy over time.
2. Early Union leadership was shaky. George B. McClellan trained troops well but moved too cautiously. His Peninsula Campaign failed to take Richmond.
3. The western theater showed Northern strength more clearly. Fort Henry, Fort Donelson, Shiloh, and David Farragut’s capture of New Orleans opened the South to attack.
4. Antietam in 1862 stopped Lee’s invasion of the North. It was not a crushing tactical victory, but it was a strategic Union success.
5. Gettysburg in July 1863 ended Lee’s second invasion. Pickett’s Charge failed, and the battle became the Confederacy’s “high-water mark.”
6. Vicksburg, also in July 1863, gave the Union control of the Mississippi and split the Confederacy.
7. In 1864, Grant coordinated simultaneous offensives. His campaigns included the Wilderness, Spotsylvania, Cold Harbor, and the siege of Petersburg.
8. Sherman captured Atlanta in 1864, lifting Northern morale and helping Lincoln beat McClellan in the election.

How the War Became a Total Mobilization Struggle

This war pulled in whole societies, not just armies.

• Both sides began with volunteers, then moved to conscription.
• The Confederacy passed the first national draft in 1862. Exemptions for some slaveholders caused resentment.
• The Union draft came in 1863. Substitution and commutation made it look like wealthier men could avoid service.

The home front was full of strain.

• In the North, Peace Democrats, called Copperheads, wanted negotiation.
• The New York City Draft Riots of 1863 mixed anti-draft anger with brutal racist violence against African Americans.
• In the South, inflation, shortages, taxation, impressment, and desertion weakened support.
• The Richmond Bread Riot of 1863 showed civilian desperation.
• Unionist resistance in Appalachia led to West Virginia joining the Union in 1863.

Women kept both societies functioning. They ran farms and businesses and worked as nurses and relief workers. The United States Sanitary Commission helped support Union soldiers. Disease killed more soldiers than battle wounds.

Why the Confederacy Could Not Keep Fighting

Confederate hopes for foreign help collapsed. Cotton diplomacy failed because Britain and France found cotton in Egypt and India, Britain depended on Northern grain, and slavery made open support harder. After Antietam and the Emancipation Proclamation, intervention became even less likely.

Emancipation also changed the military balance. Enslaved people fled to Union lines, weakening Southern labor. Nearly 180,000 African American men served in the Union Army and about 20,000 in the Navy.

By late war, Union strategy became hard war. That meant attacking the South’s ability to keep armies in the field.

• Sherman’s March to the Sea destroyed railroads, crops, mills, and supply lines.
• Philip Sheridan wrecked resources in the Shenandoah Valley.
• Attrition favored the Union because the North could replace men and supplies better.

The end came fast in 1865. Petersburg and Richmond fell, and Lee surrendered to Grant at Appomattox Court House on April 9, 1865. This scene shows that final surrender meeting. The Union had kept pressure on until Confederate armies, morale, diplomacy, and infrastructure all collapsed together.

Lee surrenders to Grant at Appomattox Court House, 1865