Original sentence: By 1855, the South was losing political power to the more populous North and was locked in a series of constitutional and political battles with the North regarding states' rights and the status of slavery in the territories.In the four years of war which followed, the South found itself as the primary battleground, with all but two of the main battles taking place on Southern soil.Polk imposed a low-tariff regime on the country (Walker Tariff of 1846), which angered Pennsylvania industrialists, and blocked proposed federal funding of national roads and port improvements.The Confederacy retained a low tariff regime for European imports but imposed a new tax on all imports from the North.The South suffered much more than the North, primarily because the war was fought almost entirely in the South.The Union (so-called because they fought for the United States of America) eventually defeated the Confederate States of America (the formal name of the southern American states during the Civil War)
Edited sentence: By 1855, the South was losing political power to the more populous North and was locked in a series of constitutional and political battles with the North regarding states' rights, abuse of tariffs and excessive taxation, and the status of slavery in the territories.In the four years of war which followed, the South found itself as the primary battleground of the invasion, with all but two of the main battles taking place on Southern soil.Polk imposed low-tariffs on the country (Walker Tariff of 1846), which angered Pennsylvania protectionist northern industrialists, and blocked proposed federal funding of national roads and port improvements.The Confederacy retained low tariffs for European imports but imposed a new tax on all imports from the North.The South suffered much more than the North, primarily due to northern adoption of total war tactics and the majority of the war being fought almost entirely in the South.The Union (so-called because they fought for the United States of America) eventually defeated the Confederate States of America (the formal name of the southern American state during the Civil War)