How did the Dred Scott decision contribute to rising tensions during the pre-Civil War
period?

Southerners approved the Dred Scott decision believing Congress had no right to prohibit slavery in the territories. ... Overall, the Dred Scott decision had the effect of widening the political and social gap between North and South and took the nation closer to the brink of Civil War.

Explanation:

in the 1800s, chinese workers migrated to the united states, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry. chinese immigrants were particularly instrumental in building railroads in the american west, and as chinese laborers grew successful in the united states, a number of them became entrepreneurs in their own right. as the numbers of chinese laborers increased, so did the strength of anti-chinese sentiment among other workers in the american economy. this finally resulted in legislation that aimed to limit future immigration of chinese workers to the united states, and threatened to sour diplomatic relations between the united states and china.

"germany's geographic location was an advantage when it was on the offensive in the war because it was situated next to an extremely wide river, the rhine, which was difficult for the allies to cross."