riddle - separate with a riddle, as grain from chaff screen sift, sieve, strain - separate by passing through a sieve or other straining device to separate out coarser elements; sift the flour
Causes of the Civil War: Slavery and Control of the Government. Throughout the first half of the 19th century, Southern politicians sought to defend slavery by retaining control of the federal government.
Causes Of Secession. Before the Civil War, the country was dividing between North and South. Issues included States Rights and disagreements over tariffs but the greatest divide was on the issue of slavery, which was legal in the South but had gradually been banned by states north of the Mason-Dixon line.