what event triggered the war between the union and confederacy
His raid started the tension between the North (Union) and the South (Confederacy). Later, many white Southerners blamed the North for Brown's acts. That is the first event that triggered the Civil War.he Union had the majority of the factories, and sold their products to countries like Grea â¦ t Britain, France and Spain. The Confederacy had the majority of the farm land and sold cotton and other cash crops to Great Britain.