Which of the following caused further sectional division over the issue of slavery prior to the Civil War?

Politicians were forced to deal with the issue of slavery and its westward expansion as early as the Missouri Compromise of 1820. The States had previously maintained a shaky balance in the Senate with an equal number of representatives from both Slave and Free States. As Missouri prepared to enter the Union as a Slave State, this tentative balance threatened to come undone. Henry Clay of Kentucky temporarily solved the issue by crafting the Missouri Compromise, bringing Missouri into the Union as a Slave State and, as a balance, Maine entered as a Free State. The Compromise also made future bondage illegal in all areas of the Louisiana Purchase north of the 36°30′ parallel with the exception of Missouri; all future states below this line would become Slave States. 3 This Compromise solved the immediate problem of slavery in the Louisiana Purchase by sweeping the real issue of slavery under the rug in order to placate both northern and southern politicians. In the years to come, politicians of both northern and southern states would not be so quick so compromise.

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.