- Pre Civil War: The technological advances and religious and social movements of the Antebellum Period had a profound effect on the course of American history. This includes westward expansion to the Pacific, a population shift from farms to industrial centers, sectional divisions that ended in civil war, the abolition of slavery and the growth of feminist and temperance movements.
Post Civil War: After the Civil War, the Reconstruction Era began. Confederate states pledged their loyalty to the U.S. Government and began to draft new constitutions. The U.S. was unified after the dividing war which was a huge turning point.
2.Pre Civil War: The British textile industry used Southern U.S. cotton in order to keep stocks in the mills operating. U.S. cotton workers and slaves had no interests in British politics, except that their relations should be good enough to hold their exports running. Relations with Britain and Canada were stable before the Civil War and trade was effective.
Post Civil War: Britain and Canada now had different views on the U.S. as they did not recognize the Confederate states and did not agree with the Civil War. Following the Civil War, the U.S. had interests in raiding Vermont, but Canada wasn't fond of that idea. Britain held grudges towards the U.S. as it had impacted Britain’s economy and trade.