Why was it dangerous for African American troops to fight for the union? What could happen if they where caught by the southerners

Francis Bacon was an English philosopher and scientist. He is known as the creator of Empiricism. A theory that states that knowledge comes from the trial of a proposed hypothesis. In other words, proving what is stated by putting a proposal into practice and either proving it or neglecting it.

Rene Descartes was a French mathematician and scientist. He is known as the father of the Cartesian Coordinate System. A system that specifies the location of a point in a plane by giving it a set of coordinates (axis X and Y). This method is widely used nowadays.