The American Civil War and the Rise of U.S. Imperialism: A Historical Overview
The Outbreak of the Civil War
A Nation Divided
Within three months of Lincoln’s victory, seven Southern states seceded from the Union to form the Confederate States of America.
Fort Sumter and Secession
In April 1861, Confederate forces bombarded Fort Sumter in Charleston, South Carolina, forcing its surrender. Following this, four more states seceded.
Border States and Loyalties
The border slave states of Maryland, Delaware, Missouri, and Kentucky remained loyal to the Union, though opinions in Missouri and Kentucky were sharply divided.
The Confederate and Union Sides
- Confederate: 11 states with a population of 9 million (including 3 million slaves) and a strong military tradition.
- Union: 23 states with a population of 22 million, a strong manufacturing base, and an extensive railroad network.
European Neutrality
The Confederacy failed to gain European support, despite “cotton diplomacy.” Europe had a surplus of cotton and needed grain, which it imported primarily from the North.
Four Years of Fighting
Key Theaters of War
The main theaters of war were the Mississippi Valley and the Eastern Seaboard.
Naval Superiority and Blockade
The Union had naval superiority but couldn’t establish an effective blockade until 1863.
Progress in the Mississippi Valley
General Grant and his Union forces gradually divided the Confederacy in two.
Stalemate in Virginia
Union forces suffered numerous defeats against Generals Lee and “Stonewall” Jackson in Virginia, resulting in a stalemate.
The Turning Point: Gettysburg and Lincoln’s Address
The Battle of Gettysburg (Pennsylvania) in July 1863 marked a turning point. Four months later, Lincoln delivered the Gettysburg Address, emphasizing the Union’s fight to preserve “government of the people, by the people, for the people.”
The End of the War and its Aftermath
General Lee surrendered at Appomattox, Virginia, in April 1865, ending the war. However, Union troops remained in the South until 1877.
The Effects of the Civil War
Reconstruction and Lingering Hostilities
Southern states rejoined the USA, but resentment remained, culminating in Lincoln’s assassination five days after Appomattox.
Amendments and the Promise of Equality
The 13th, 14th, and 15th Amendments granted freedom and citizenship to Black Americans, theoretically giving them equal rights.
Enduring Divisions and the Legacy of Slavery
North-South differences persisted, evident in state flags like those of Georgia (1956-2001) and Mississippi, which resembled Confederate flags. The South’s mistreatment of Black Americans continued for decades, leaving a lasting impact on race relations.
The Monroe Doctrine and American Isolationism
Principles of the Monroe Doctrine (1823)
- Non-colonization: The USA opposed new European colonies in the Americas.
- Non-intervention: European nations should not interfere in the affairs of newly independent American countries.
- Non-interference: The USA would accept existing European colonies.
British Enforcement and American Influence
Britain helped enforce the Monroe Doctrine, opening Latin America to British and U.S. economic influence.
The Americas as a Sphere of Influence
The Monroe Doctrine established the Americas as the USA’s exclusive sphere of influence.
Westward Expansion and Interventionism
Despite the isolationist principles of the Monroe Doctrine, 19th-century westward expansion can be seen as interventionist, even imperialist.
The Move Towards Imperialism
Shifting Foreign Policy
Around the turn of the century, U.S. foreign policy became increasingly imperialist, both territorially and economically.
Formal and Informal Control
The USA exerted control over overseas nations through colonization, military occupation, economic domination, and political subversion.
The Spanish-American War and its Consequences
Intervention in Cuba
In 1898, following the sinking of the USS Maine, the USA declared war on Spain, ostensibly to protect American interests in Cuba.
Acquisition of Territories
The USA gained control of Cuba’s sugar and tobacco industries and acquired Puerto Rico, Guam, and the Philippines as colonies.
Expansion in the Pacific and Latin America
Annexation of Pacific Islands
As American trade expanded, the USA annexed Hawaii, Samoa, and Wake Island.
Intervention in Latin America
Between 1900 and 1917, the USA intervened in six Latin American countries, justifying its actions based on political or economic instability (the Roosevelt Corollary).
Criticism of Imperialism
Anti-imperialists criticized the oppression of other peoples, highlighting the contradiction with American ideals of self-determination.