This sign was prior to the revolution in 1776.
"The folly of England" refers to unfairness of the tax of the stamp. If this tax's enforced, then it cause "Ruin of America" as it would Enrich England and take more money out of the American pockets.
During the ensuing decades, the abolitionist movement grew in Northern states, and Congress regulated the expansion of slavery as new states were admitted to the Union. Britain banned the importation of African slaves in its colonies in 1807 and abolished slavery in the British Empire in 1833.
What about the objects found in no man’s land?
spiritual songs were sung in the fields to keep their spirits up
I believe the answer is B. Buffalo